Thread: Checking for letters

I'm writing a program that involves numbers and I want to make sure that what the user enters are numbers. Here is what I have so far but can't figure out how to do the check;

Code:

/*************
#include <stdio.h>

void main (void)

{
	
	char name [20];
	
	int numbers [5];

	int average;
	
	printf ("Please enter your name\n\n");
	
	gets(name);
	
	printf ("\n\nThank you %s, now enter 5 numbers pressing Enter after each\n\n", name);

	scanf("%d%d%d%d%d", &numbers[0],&numbers[1],&numbers[2],&numbers[3],&numbers[4]);

	average = (numbers[0] + numbers[1] + numbers[2] + numbers[3] + numbers[4]) / 5;

	printf ("\n\n%s the average of those numbers is %d,\n\n", name, average);

	printf ("\n\n%d%d%d%d%d\n\n", numbers[4], numbers[3], numbers[2], numbers[1], numbers[0]);

	return ;

}
************/

I would really be thankful for any help.

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