質問編集履歴
3
誤植の訂正
test
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File without changes
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test
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@@ -106,7 +106,7 @@
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106
106
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107
107
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108
108
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109
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-
return vec![n
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109
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+
return vec![ans1, ans2];
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110
110
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111
111
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```
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112
112
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2
試したことを追記
test
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File without changes
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test
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@@ -91,3 +91,67 @@
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91
91
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For more information about this error, try `rustc --explain E0308`.
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92
92
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93
93
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```
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94
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+
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95
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+
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96
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+
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97
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+
試したこと： as で usize -> i32 へ変換する
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98
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+
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99
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+
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100
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+
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101
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+
```rust
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102
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+
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103
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+
let ans1 = i as i32;
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104
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+
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105
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+
let ans2 = j as i32;
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106
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+
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107
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+
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108
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+
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109
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+
return vec![num1, num2];
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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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+
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113
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+
をif文の中に入れたところ次のようなエラーが出ました。
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114
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+
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115
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+
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116
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+
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117
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+
```bash
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118
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+
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119
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+
error[E0308]: mismatched types
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120
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+
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121
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+
--> src/main.rs:2:5
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122
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+
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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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+
1 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
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126
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+
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127
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+
| -------- expected `std::vec::Vec<i32>` because of return type
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128
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+
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129
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+
2 | / for i in 0..(nums.len() - 1) {
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130
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+
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131
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+
3 | | for j in i..nums.len() {
|
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132
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+
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133
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+
4 | | if nums[i] + nums[j] == target {
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|
134
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+
|
|
135
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+
5 | | let ans1 = i as i32;
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|
136
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+
|
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137
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+
... |
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138
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+
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139
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+
10 | |
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140
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+
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141
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+
11 | | }
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142
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+
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143
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+
| |_____^ expected struct `std::vec::Vec`, found ()
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144
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+
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145
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+
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|
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146
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+
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147
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+
= note: expected type `std::vec::Vec<i32>`
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148
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+
|
|
149
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+
found type `()`
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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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+
error: aborting due to previous error
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|
154
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+
|
|
155
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+
For more information about this error, try `rustc --explain E0308`.
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|
156
|
+
|
|
157
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+
```
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1
エラーメッセージの追記
test
CHANGED
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File without changes
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test
CHANGED
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@@ -31,3 +31,63 @@
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31
31
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32
32
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33
33
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Rust 自体が初心者なのでこの考え方自体があっているかどうかも知りたいです。よろしくお願いします。
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34
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+
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35
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+
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36
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+
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37
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+
(追記) エラーメッセージ
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|
38
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+
|
|
39
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+
```bash
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|
40
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+
|
|
41
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+
error[E0308]: mismatched types
|
|
42
|
+
|
|
43
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+
--> src/main.rs:5:29
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|
44
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+
|
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45
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+
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|
46
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+
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47
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+
5 | return vec![i, j];
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48
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+
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|
49
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+
| ^ expected i32, found usize
|
|
50
|
+
|
|
51
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+
|
|
52
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+
|
|
53
|
+
error[E0308]: mismatched types
|
|
54
|
+
|
|
55
|
+
--> src/main.rs:2:5
|
|
56
|
+
|
|
57
|
+
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|
|
58
|
+
|
|
59
|
+
1 | fn my_func(nums: Vec<i32>, target: i32) -> Vec<i32> {
|
|
60
|
+
|
|
61
|
+
| -------- expected `std::vec::Vec<i32>` because of return type
|
|
62
|
+
|
|
63
|
+
2 | / for i in 0..(nums.len() - 1) {
|
|
64
|
+
|
|
65
|
+
3 | | for j in i..nums.len() {
|
|
66
|
+
|
|
67
|
+
4 | | if nums[i] + nums[j] == target {
|
|
68
|
+
|
|
69
|
+
5 | | return vec![i, j];
|
|
70
|
+
|
|
71
|
+
... |
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|
72
|
+
|
|
73
|
+
8 | |
|
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74
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+
|
|
75
|
+
9 | | }
|
|
76
|
+
|
|
77
|
+
| |_____^ expected struct `std::vec::Vec`, found ()
|
|
78
|
+
|
|
79
|
+
|
|
|
80
|
+
|
|
81
|
+
= note: expected type `std::vec::Vec<i32>`
|
|
82
|
+
|
|
83
|
+
found type `()`
|
|
84
|
+
|
|
85
|
+
|
|
86
|
+
|
|
87
|
+
error: aborting due to 2 previous errors
|
|
88
|
+
|
|
89
|
+
|
|
90
|
+
|
|
91
|
+
For more information about this error, try `rustc --explain E0308`.
|
|
92
|
+
|
|
93
|
+
```
|