problem 48

#include <stdio.h>

int main() {
    char s[100];
    int i = 0;
    printf("Enter lowercase String: ");
    gets(s);
    while (s[i] != '\0') {
        s[i] = s[i] - 32;
        i++;
    }
    printf("Uppercase: %s", s);
    return 0;
}

Enter a lowercase string: