题解 | #大小写转换#

#include <stdio.h>

int main() {
    char a,b,c,d,e;
    scanf("%c\n%c\n%c\n%c\n%c\n",&a,&b,&c,&d,&e);
    if(a>=65||a<=90){
        printf("%c\n",a+32);
        printf("%c\n",b+32);
        printf("%c\n",c+32);
        printf("%c\n",d+32);
        printf("%c\n",e+32);
    }
    else if(a>=92||a<=122){
        printf("%c\n",a-32);
        printf("%c\n",b-32);
        printf("%c\n",c-32);
        printf("%c\n",d-32);
        printf("%c\n",e-32);
    }
    return 0;
}