C
32个
一个字节 byte = 8bit 数值是以补码来表示的
例如：求-10的补码
原码 0 0001010
取反 1 1110101
加一 1 1110110
第一位是符号位
数字从65开始 + 32 表示对应的小写字母
int main() {
for (int i = 0; i < 256; ++i) {
char c = i;
if (c == 'A') {
printf("%d\n", i); // 65
}
if (c == 'a') {
printf("%", i); // 97
}
}
}
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