#include<stdio.h>
int main()
char*process_payment(int paymentamount, int accountbalance,int isactive);
{
    if(isactive==0)
    {
        return"Account inactive";
    }
    else if (accountBalance<paymentAmount)
    {
        return"insufficient Balance";
    }
    else
    {
        double new_balance=(double)accountBalance-(double)payment;
        char*result=(char*)malloc(20*sizeof(char));
        if(result==NULL)
        {
            return NULL;
        }
        printf(result,"%.2f",new_balance);
        return result;
    }
}