P5733 [深基6.例1] 自动修正

#include <cstdio>
#include <cstring>
char s[105];
int main()
{
    scanf("%s", s);
    int len = strlen(s);
    for (int i = 0; i < len; ++i) {
        if (s[i] >= 'a' && s[i] <= 'z') {
            s[i] -= 32;
        }
    }
    printf("%s\n", s);
    return 0;
}