質問編集履歴
1
説明を追記
test
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File without changes
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test
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@@ -85,3 +85,77 @@
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よろしくお願いします。
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88
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89
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90
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# 2020/11/16 追記
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94
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95
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96
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97
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質問の意図をうまく伝えられず、すみません。
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98
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99
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100
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101
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negのフラグを入れると値が変わるような実装になっているのが疑問ということです。
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102
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103
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104
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105
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```c
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106
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107
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#include <stdio.h>
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108
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109
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110
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111
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int main()
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112
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113
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{
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114
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115
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int neg = 0;
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116
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117
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unsigned char num;
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118
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119
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120
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121
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num = 255;
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122
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123
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printf("%d\n", num);
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124
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125
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if ((char)num < 0)
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126
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127
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{
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128
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129
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neg = 1;
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130
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131
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printf("%d\n", (char)num);
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132
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133
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printf("%d\n", num);
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134
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135
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num = -(char)num;
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136
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137
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printf("%d\n", num);
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138
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139
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}
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140
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141
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return (0);
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142
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143
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}
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144
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145
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```
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148
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149
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実行結果
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150
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151
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```
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152
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153
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255
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154
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155
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-1
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156
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157
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255
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158
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159
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1
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160
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161
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```
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