小写字母转换为大写.c

#include <stdio.h>

int main(){

char lower;

char upper;

scanf("%c", &lower);

if (lower >= 'a' && lower <= 'z') {

        upper = lower - 32;

        printf("对应的大写字母为：%c\n", upper);

} else {

        upper = lower;

        printf("您输入的不是小写字母。");

}

return 0;

}