K+R Exercise2_10

#include <stdio.h>


int lower(int c);   // If const is passed it must be declared

int main()
{
    int i, c;

    printf("Enter characters >");
    while((c=getchar())!=EOF && c!='\n') {
        i = lower(c);
        printf("%c",i);
    }
    puts(" ");
    return(0);
}

/* lower: convert c to lower case; ASCII only */
int lower(int c)
{                                                    //  a ? b : c
    c = (c>='A' && c<='Z') ? (c+'a'-'A') : c;        // if a return b else return c
    return c;
}