1105_1_HW_1

#include <stdio.h>
#include <string.h>

void MakeUpper(char *s);

int main(void)
{
    char str[] = "hello world";
    MakeUpper(str);
    printf("str = %s\n", str);

    return 0;
}

void MakeUpper(char *s)
{
    int i;
    int len = strlen(s);
    int diff = 'a' - 'A';

    for(i=0; i<len; i++)
    {
        if(s[i] >= 'a' && s[i] <= 'z')
            s[i] = s[i] - diff;
    }
}