Can't stop my program at zero (Loan Table)

Ok I had to make a loan table where you enter the loan amount, the monthly interest rate, and the amount of the monthly payment, it then prints out a table containing the month, payment, interest, and remaining

I can't get the program to stop when remaining = 0

Here is my code:

Code:

#include <stdio.h>

int main()

{
    double loan_amt;
    double interest_rate;
    double remaining;
    double interest;
    double payment;
    int month = 1;
   
    printf("Enter the loan amount\n");
    scanf("%lf", &loan_amt);
    printf("Enter the monthly interest rate of the loan\n");
    scanf("%lf", &interest_rate);
    printf("Enter the amount of the monthly payment\n");
    scanf("%lf", &payment);
   
    printf("+-------+---------+-----------+----------+\n");    
    printf("| Month | Payment | Interest  | Remaining | \n");
    printf("+-------+---------+-----------+----------+\n");
   
    interest_rate = (loan_amt*(interest_rate/100));
   
while(loan_amt > 0)
    { 
      interest = (loan_amt*(interest_rate/100)); 
      loan_amt = loan_amt+interest; 

      printf("| %3d   | %5.2lf  | %4.2lf     | %.2lf   |\n",
      month, payment, interest, loan_amt);
      month++;
            if(payment > (loan_amt + interest)) 
      {
        interest = (loan_amt*(interest_rate/100));   
        payment = (loan_amt + interest);   
        loan_amt = 0; 
        printf("| %3d   | %5.2lf  | %4.2lf     | %.2lf   |\n",
        month, payment, interest, loan_amt);
    
      }
    }

    system("PAUSE");
    return 0;
}

Can someone please help me?
Thanks, I would really appreciate it.

I don't see where you actually take the payment out of the amount of the loan. (So your loan_amt just goes up and up ...)

You never subtract the payment from the loan. Therefore the outstanding loan grows forever.

EDIT:

Here's working code:

Code:

#include <stdio.h>

int main()

{
    double loan_amt;
    double interest_rate;
    double remaining;
    double interest;
    double payment;
    int month = 1;
   
    printf("Enter the loan amount\n");
    scanf("%lf", &loan_amt);
    printf("Enter the monthly interest rate of the loan\n");
    scanf("%lf", &interest_rate);
    printf("Enter the amount of the monthly payment\n");
    scanf("%lf", &payment);
   
    printf("+-------+---------+-----------+----------+\n");    
    printf("| Month | Payment | Interest  | Remaining | \n");
    printf("+-------+---------+-----------+----------+\n");
   
    interest_rate = (loan_amt*(interest_rate/100));
   
while(loan_amt > 0)
    { 
      interest = (loan_amt*(interest_rate/100)); 
      /* EDIT START EDIT START EDIT START */
      /* notice the "-payment" at the end, that's the only part i added */
      loan_amt = loan_amt+interest-payment;
      /* EDIT END EDIT END EDIT END */ 

      printf("| %3d   | %5.2lf  | %4.2lf     | %.2lf   |\n",
      month, payment, interest, loan_amt);
      month++;
            if(payment > (loan_amt + interest)) 
      {
        interest = (loan_amt*(interest_rate/100));   
        payment = (loan_amt + interest);   
        loan_amt = 0; 
        printf("| %3d   | %5.2lf  | %4.2lf     | %.2lf   |\n",
        month, payment, interest, loan_amt);
    
      }
    }

    system("PAUSE");
    return 0;
}

EDIT #2:

You also need to add code to check if the interest is greater than the payment. If that is the case the loop just goes on forever...

Edit* trying to figure it out

Originally Posted by ITAmember

You also need to add code to check if the interest is greater than the payment. If that is the case the loop just goes on forever...

I know this sounds stupid but as you can see I have no idea what i'm doing...
Can you (or anyone?) point me in the right direction as to what code I need to add to stop this loop?

I know you said I need to add code to check if the interest is > payment but... how do I do that?

Code:

      if(interest > payment)
      {
        printf("\nO noes! Your interest is greater than your payment and the \n"
               "loop goes on forever!\n\n");
        system("PAUSE");
        return 0;
      }

Originally Posted by ITAmember

Code:

      if(interest > payment)
      {
        printf("\nO noes! Your interest is greater than your payment and the \n"
               "loop goes on forever!\n\n");
        system("PAUSE");
        return 0;
      }

I think

Code:

if(interest > payment)
  {
      while (1) {
        printf("\nO noes! Your interest is greater than your payment and the \n"
                  "loop goes on forever!\n\n");
      }
  }

would be more fitting

I'm doing something very wrong.

using these numbers: loan amount = 5500
monthly interest rate = 1.2%
monthly payment = 700

the table should look like this:

+--------+-----------+----------+-------------+
| Month |Payment Interest Remaining
+--------+-----------+----------+-------------+
| 1 | 700.00 | 66.00 | 4866.00 |
| 2 | 700.00 | 58.39 | 4224.39 |
| 3 | 700.00 | 50.69 | 3575.08 |
| 4 | 700.00 | 42.90 | 2917.99 |
| 5 | 700.00 | 35.02 | 2253.00 |
| 6 | 700.00 | 27.04 | 1580.04 |
| 7 | 700.00 | 18.96 | 899.00 |
| 8 | 700.00 | 10.79 | 209.79 |
| 9 | 700.00 | 2.52 | 0.00 |
+---------+----------+----------+-------------+

Instead of entering 1.2 for the interest rate you enter 0.012. 1.2 would be 120%, 0.012 would be 1.2%.

The remaining is suppose to go down, not up!

Code:

Enter the loan amount
5500
Enter the monthly interest rate of the loan
0.012
Enter the amount of the monthly payment
700
+-------+---------+-----------+----------+
| Month | Payment | Interest  | Remaining |
+-------+---------+-----------+----------+
|   1   | 700.00  | 36.30     | 4836.30   |
|   2   | 700.00  | 31.92     | 4168.22   |
|   3   | 700.00  | 27.51     | 3495.73   |
|   4   | 700.00  | 23.07     | 2818.80   |
|   5   | 700.00  | 18.60     | 2137.41   |
|   6   | 700.00  | 14.11     | 1451.51   |
|   7   | 700.00  | 9.58     | 761.09   |
|   8   | 700.00  | 5.02     | 66.12   |
|   9   | 66.55  | 0.44     | 0.00   |
Press any key to continue . . .