Ex_2.10_lowercondit.c

/* Function lower(c) using conditional expression */

#include<stdio.h>

int lower(int c);

int main(void)
{
	int c;
	
	while((c=getchar())!=EOF)
	{
		putchar(lower(c));
	}
}

int lower(int c)
{
	return c>='A' && c<='Z'? c+'a'-'A':c;
}