How to write a c program that prints a loan amortization schedule based on user input of principal annual percentage rate of interest and number of years in the loan Interest is calculated monthly?

Answer 1

#include <stdio.h>

#include <math.h>

#define p printf

#define s scanf

int mnthlyPymnt(float loan,float i_yr,int num_yrs );

void table(float loan, float IM, float monthly, int NM);

int main(void)

{

float in_loan,in_yr;

int in_yrs;

p("\nThe amount of the loan (principal): ");

s("%f", &in_loan);

p("\nInterest rate/year (percent)? ");

s("%f",&in_yr);

p("\nNumber of years:\t");

s("%d",&in_yrs);

mnthlyPymnt( in_loan, in_yr, in_yrs );

return 0;

}

int mnthlyPymnt(float loan,float i_yr,int num_yrs )

{

int NM;

float IM, monthly;

float P, Q;

NM = num_yrs * 12;

IM = (i_yr / 12)/100;

P =pow (1 + IM, NM);

Q= (P /(P-1));

monthly = loan * IM * Q;

p("\nThe amount of the loan (principal): %.2f",loan);

p("\nInterest rate/year (percent): %.0f%%", i_yr);

p("\nInterest rate/month (decimal):%f ", IM);

p("\nNumber of years: %d", num_yrs);

p("\nNumber of months: %d",NM);

p("\nMonthly Payment:%.2f ", monthly);

table(loan, IM, monthly, NM);

return monthly;

}

void table(float loan, float i_month, float monthly, int n_month)

{

float int_paid, prin_paid, new_b,total_paid;

int month, x;

p("\n\nMonth OldBalance MonthlyPayment InterestPaid PrincipalPaid NewBalance");

month = n_month;

int_paid = loan * i_month;

prin_paid = monthly - int_paid;

new_b = loan - prin_paid;

total_paid = monthly;

for(x=1;x<=month;x++)

{

p("\n%d\t%.2f\t\t%.2f\t\t%.2f\t\t%.2f\t\t%.2f", x, loan, monthly, int_paid, prin_paid,new_b);

loan = new_b;

total_paid = total_paid + monthly;

int_paid = loan * i_month;

prin_paid = monthly - int_paid;

new_b = loan - prin_paid;

}

total_paid = total_paid - 441.93;

p("\n\nTotal amount paid: %.2f", total_paid);

}