gistfile1.c

#include<stdio.h>

int main() {
	double a, b;
	int choice;

	do {
		printf("Enter two numbers: ");
		scanf("%lf %lf", &a, &b);
		printf("%lf / %lf = %lf\n", a, b, a / b);
		printf("Do it again? ");
		scanf("\n"); // We still have a newline character in the buffer...
		scanf("%c", &choice);
	} while (choice == 'y' || choice == 'Y');

	return 0;
}