gistfile1.txt

#include <stdio.h>
#include <cs50.h>

int main (void)
{
float f=0;
//int counter25=0;
printf("%f",f);
printf("How much money you want to get back?\n");

    do
    {
        f = GetFloat();
        printf("%f",f); 
    }    
    while(f<0);

printf("%f",f);