题解 | 大小写转换
大小写转换
https://www.nowcoder.com/practice/4e089ee8966a4ed4b306f64e68d45264
#include <stdio.h> int main() { char ch1 = 0; while (scanf("%c", &ch1) != EOF) { if (ch1 >= 65 && ch1 <= 90) { printf("%c\n", ch1 + 32); } else if(ch1 >= 90 && ch1 <= 122) { printf("%c\n", ch1 - 32); } } return 0; }