hey guys I have a hard time finding out how to create a function to run in a program that I'm supposed to do.

In the middle of this page (highlighted in pink) is a formula for calculating the amount I’d have in the bank after t years if I invested an amount P at an annual interest rate of r, and the interest is compounded n times per year. Write a function called interest which calculates the interest I’ve earned after m months. The function should accept 4 arguments: the principal amount P, the annual interest rate r, the number of times interest is compounded each year n, and the number of months m that the money has been in thebank. The output of the function should be the interest earned. Then write a program which does the following. The user should enter an initial investment P and an annual rate r. The program should then generate a table giving the interest after 3 months, 6 months, 9 months, and 12 months for interest compound annually, monthly,

and daily (assume 365 days/year). You must use the function interest in your program. The name of this program must be IntTable.c

Important Note: The interest earned is not equal to A! A is the total amount in the bank, the interest earned is the final amount minus the initial amount.

A = P * ( 1 + r/n ) ^(nt)

where,

P = principal amount (initial investment)

r = annual interest rate (as a decimal)

n = number of times the interest is compounded per year

t = number of years

A = amount after time t

Example output for Part A:

% a.out

Enter your initial investment P: 2500.00

Enter the annual interest rate r: 0.04

Interest earned for different compounding schemes is as follows:

Investment Time Annually Monthly Daily

3 months 24.63 25.08 25.12

6 months 49.51 50.42 50.50

9 months 74.63 76.01 76.13

12 months 100.00 101.85 102.02

%

so far i only have the headings: Investment Time, Annually, Monthly, Daily,

and 3 months, 6 months, 9 months, 12 months set correctly.

I'm having lots of trouble creating the function though,

whenever i try to compile using gcc -lm IntTable.c I keep getting the error:Code:`#include <stdio.h>`

#include <math.h>

int interest( float y );

/* function main begins program execution */

int main()

{

float P;

float r;

int n;

float t;

int A;

printf( "\n enter your initial ivestment P: " );

scanf( "%.2f", &P );

printf( "enter the annual interest rate r: " );

scanf( "%.2f", &r );

printf( "\n%15s%10s%9s%8s\n", "Investment Time", "Annually", "Monthly", "Daily" );

printf( " 3 months\n" );

printf( " 6 months\n" );

printf( " 9 months\n" );

printf( " 12 months\n" );

for ( A == 1 ; A <= 4 ; A++ ) {

printf( "%20d ", interest ( A ) );

}

return 0;

}

int interest( float y )

{

int a;

int b;

int c;

int d;

int pow;

y = a * pow( 1 + b / c, c * d );

y -= a;

return y;

}

IntTable.c:54: error: "called object is not a function"

Can YOU help me please?