View Code of Problem 25

#include <stdio.h>
#include <stdlib.h>
#include<ctype.h>
#include<string.h>
#include<math.h>

int main()
{
	char a[1000];
	int i, j,n;
	scanf("%d", &n);
	while (n--)
	{
		scanf("%s", a);
		for (i = 0; i < strlen(a); i++)
		{
			if (a[i] >= 'a'&&a[i] <= 'z')
				a[i] = a[i] - 32;
			else if (a[i] >= 'A'&&a[i] <= 'Z')
				a[i] = a[i] + 32;
		}
		
		printf("%s\n",a);
	}
	return 0;
}