Exercise 2.10

Page 52

Rewrite the function lower, which converts upper case letters to lower case, with a conditional expression instead of if-else.

#include <stdio.h>
#define STR_LEN 1000

void lower(char str[], int len);

int main()
{
	char str[STR_LEN] = "AbCdEfGh";
	lower(str, STR_LEN);
	printf("%s\n", str);
}

void lower(char str[], int len)
{
	for (int i = 0; i < len; i++) {
		str[i] = str[i] >= 'A' && str[i] <= 'Z' ? str[i] + 32 : str[i];
	}
}