回答編集履歴
4
ソースの追加
test
CHANGED
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@@ -103,3 +103,39 @@
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}
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```
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<追記>
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108
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109
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2文字ずつ分けたい場合substringを使うこともできます。
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110
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111
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```Java
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public class Main {
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public static void main(String[] args) throws Exception {
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String num = "1234";
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String hairetu[] = new String[2];
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int sum = 0;
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for(int i = 0; i < 2; i++){
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hairetu[i] = num.substring(i * 2,i * 2 + 2);
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sum += Integer.parseInt(hairetu[i]);
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}
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System.out.println(sum);
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}
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}
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```
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3
ソースの訂正
test
CHANGED
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@@ -44,31 +44,57 @@
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```
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-
<
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<訂正>
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-
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与えられた文字列から求める場合
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50
50
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51
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```Java
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52
52
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-
public class
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public class Main {
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public static void main(String[] args){
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-
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String line = "1234";
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60
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String []hairetu = line.split("");
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int sum = 0;
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64
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for(int i = 0; i < 2; i++){
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66
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sum += Integer.parseInt(hairetu[i * 2] + hairetu[i * 2 + 1]);
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68
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69
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}
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70
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System.out.println(sum);
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}
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74
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}
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```
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84
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85
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与えられた変数から直接求める場合
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86
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87
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```Java
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88
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public class Main {
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public static void main(String[] args){
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int num = 1234;
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96
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-
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int sum = num / 100 + num % 100;
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62
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-
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63
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String []hairetu = str.split("");
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64
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int sum = 0;
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for (String hairetu1 : hairetu) {
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sum += Integer.parseInt(hairetu1);
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}
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System.out.println(sum);
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100
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@@ -77,99 +103,3 @@
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}
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105
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```
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80
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-
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<追記2>
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82
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-
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2桁ごと区切ってそれぞれの和を求めるコードを載せておきます。
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84
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-
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85
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```Java
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86
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-
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public class Sum {
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public static void main(String[] args){
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int num = 1234;
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String str = Integer.toString(num);
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String []hairetu = str.split("");
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98
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int []sum = new int[str.length()];
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-
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for(int i = 0; i < 2; i++){
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for(int j = i * 2; j < 2 * i + 2; j++){
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sum[i] += Integer.parseInt(hairetu[j]);
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}
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}
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for(int i = 0; i < 2; i++){
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System.out.println(sum[i]);
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}
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}
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}
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```
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124
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-
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また、最初与えられる"1234"がint型の時はsplit関数を使わず区切る方法があります。
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126
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-
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127
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```Java
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128
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-
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public class Sum {
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public static void main(String[] args){
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int num = 1234;
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int []pow10 = {1000,100,10,1};
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138
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int []hairetu = new int[4];
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140
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-
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141
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142
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for(int i = 0; i < 4; i++){
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hairetu[i] = (num / pow10[i]) % 10;
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146
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}
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148
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149
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int []sum = new int[hairetu.length];
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150
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-
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152
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for(int i = 0; i < 2; i++){
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for(int j = i * 2; j < 2 * i + 2; j++){
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156
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157
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sum[i] += hairetu[j];
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158
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-
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159
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}
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160
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-
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}
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for(int i = 0; i < 2; i++){
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System.out.println(sum[i]);
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}
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168
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}
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-
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}
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```
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2
説明の追加
test
CHANGED
|
@@ -77,3 +77,99 @@
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77
77
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}
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78
78
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79
79
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```
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|
80
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+
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81
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+
<追記2>
|
|
82
|
+
|
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83
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+
2桁ごと区切ってそれぞれの和を求めるコードを載せておきます。
|
|
84
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+
|
|
85
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+
```Java
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86
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+
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87
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+
public class Sum {
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88
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+
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89
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public static void main(String[] args){
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90
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91
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92
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93
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int num = 1234;
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94
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95
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String str = Integer.toString(num);
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96
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97
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String []hairetu = str.split("");
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98
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99
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int []sum = new int[str.length()];
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100
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+
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101
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102
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103
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for(int i = 0; i < 2; i++){
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104
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+
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105
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for(int j = i * 2; j < 2 * i + 2; j++){
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106
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+
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107
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+
sum[i] += Integer.parseInt(hairetu[j]);
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108
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+
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109
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+
}
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110
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+
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111
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}
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112
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113
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for(int i = 0; i < 2; i++){
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114
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115
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System.out.println(sum[i]);
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116
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117
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}
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118
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119
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}
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120
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+
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121
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}
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122
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123
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+
```
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124
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+
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|
125
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+
また、最初与えられる"1234"がint型の時はsplit関数を使わず区切る方法があります。
|
|
126
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+
|
|
127
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+
```Java
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128
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+
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129
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public class Sum {
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130
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+
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131
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public static void main(String[] args){
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132
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+
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133
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+
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134
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+
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135
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int num = 1234;
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136
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+
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137
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+
int []pow10 = {1000,100,10,1};
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138
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+
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139
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+
int []hairetu = new int[4];
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140
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+
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141
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+
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142
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+
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143
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+
for(int i = 0; i < 4; i++){
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144
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+
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145
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hairetu[i] = (num / pow10[i]) % 10;
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146
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+
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147
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+
}
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148
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+
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149
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int []sum = new int[hairetu.length];
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150
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+
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151
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+
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152
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+
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153
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for(int i = 0; i < 2; i++){
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154
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+
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155
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for(int j = i * 2; j < 2 * i + 2; j++){
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156
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+
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157
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sum[i] += hairetu[j];
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158
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+
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159
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+
}
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160
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+
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161
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}
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162
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163
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for(int i = 0; i < 2; i++){
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164
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165
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System.out.println(sum[i]);
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166
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+
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167
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}
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168
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+
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169
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}
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170
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+
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171
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+
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172
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173
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}
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174
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175
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+
```
|
1
説明の追加
test
CHANGED
|
@@ -43,3 +43,37 @@
|
|
|
43
43
|
}
|
|
44
44
|
|
|
45
45
|
```
|
|
46
|
+
|
|
47
|
+
<追記>
|
|
48
|
+
|
|
49
|
+
各位の数字の合計を算出する方法です。
|
|
50
|
+
|
|
51
|
+
```Java
|
|
52
|
+
|
|
53
|
+
public class Sum {
|
|
54
|
+
|
|
55
|
+
public static void main(String[] args){
|
|
56
|
+
|
|
57
|
+
|
|
58
|
+
|
|
59
|
+
int num = 1234;
|
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60
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+
|
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61
|
+
String str = Integer.toString( num );
|
|
62
|
+
|
|
63
|
+
String []hairetu = str.split("");
|
|
64
|
+
|
|
65
|
+
int sum = 0;
|
|
66
|
+
|
|
67
|
+
for (String hairetu1 : hairetu) {
|
|
68
|
+
|
|
69
|
+
sum += Integer.parseInt(hairetu1);
|
|
70
|
+
|
|
71
|
+
}
|
|
72
|
+
|
|
73
|
+
System.out.println(sum);
|
|
74
|
+
|
|
75
|
+
}
|
|
76
|
+
|
|
77
|
+
}
|
|
78
|
+
|
|
79
|
+
```
|