It is supposed to tell me the number of months the money will last, cannot have

Question

It is supposed to tell me the number of months the money will last, cannot have negative numbers and needs to have two decimal points. Please help.

#include <iostream>
#include <cmath>

using namespace std ;

void PrintDirections() ;
double GetPrinc() ;
double GetPmt() ;
double GetRate() ;
int Compute_Months(double S, double P, double R) ;
void Report_Months(double S, double P, double R, int N) ;

/* **************************************** */
/* MAIN */
/* **************************************** */

int main ()
{
double S ;
double P ;
double R ;
int N ;
PrintDirections() ;
S = GetPrinc() ;
P = GetPmt() ;
R = GetRate() ;
int Compute_Months() ;
void Report_Months() ;
return 0 ;
}
/* **************************************** */
/* PRINT DIRECTIONS */
/* **************************************** */

/* Print directions for the user of the program. */

void PrintDirections()
{
double R ;
double S ;
double P ;
int N ;
cout << "This program will determine how many times one can " ;
cout << "withdraw P dollars from an account earning interest rate " ;
cout << "R, assuming the initial value of the account is S dollars. " ;

cout << "You will be prompeted to enter S, P, and R, (in that " ;
cout << "order). and then the number of monthly paymets possible " ;
cout << "will be calculated and written to the screen. " ;

cout << "You must now enter the amount of the initial principal " ;
cout << "sum, S, in the account, in decimal form (for example: " ;
cout << "257823.21). Do *not* include any commas). " ;
cout << "Enter S, the amount of the initial principal sum here ==> S = " ;
cin >> S ;
cout << endl ;

cout << "You must now enter the amount of the monthly payment P in " ;
cout << "decimal form (for example: 1554.55). Do *not* " ;
cout << "include a dollar sign ($). Do *not* include any " ;
cout << "commas. " ;

cout << "Enter P, the amount of the monthly payment here ==> P = " ;
cin >> P ;
cout << endl ;

cout << "Now you must enter the annual interest rate in " ;
cout << "decimal form (for example: 4.125). Do *not* " ;
cout << "include a percent sign (%). Do *not* include any " ;
cout << "commas. " ;

cout << "Enter R, the annual interest rate here ==> R = " ;
cin >> R ;
cout << endl ;

if (
}

/* **************************************** */
/* GETPRINCIPAL */
/* **************************************** */

/* Prompt the user to enter the amount of principle
read it in, and return it to the caller. */

double GetPrinc()
{
double S ;
S = GetPrinc() ;
}

/* **************************************** */
/* GETPMT */
/* **************************************** */

/* Prompt the user to enter the amount of the monthly payment,
read it in, and return it to the caller. */

double GetPmt()
{
double P ;
P = GetPmt() ;
}

/* **************************************** */
/* GETRATE */
/* **************************************** */

/* Prompt the user to enter the amount of the annual interest
rate, read it in, and return it to the caller. */

double GetRate()
{
double R ;
R = GetRate() ;
}

/* **************************************** */
/* COMPUTE_MONTHS */
/* **************************************** */

/* Return the number of months until an initial S dollars runs
out if the account earns interest at an annual rate of R,
compounded monthly, and a payment of P dollars per month is
withdrawn. Precondition: S*R/1200 < P. */

int Compute_Months(double S, double P, double R)
{
int N ;
double r ;
r = R/1200 ;
N = (log(P) - log(P - (r * S)))/(log(1 + r)) ;
}

/* **************************************** */
/* REPORT_MONTHS */
/* **************************************** */

/* Report to the user -- tell the user that N is the number of
months it will take for S dollars to completely run out, if
annual interest rate R, compounded monthly, is earned, and P
dollars are withdrawn per month. */

void Report_Months(double S, double P, double R, int N)
{
cout << "Here is your answer: " ;
cout << "$" << S << endl ;
cout << "will run out after approximately " ;
cout << N << endl ;
cout << "months, assuming that an annual interest of " ;
cout << R << "%" << endl ;
cout << "is earned, compounded monthly, and a monthly payment of " ;
cout << "$" << P << endl ;
cout << "is withdrawn immediately after each interest payment. " ;

}


/* **************************************** */
/* END */
/* **************************************** */

Explanation / Answer

hi i ran this program and found out the error . In print decisions you have left an if statement without any condition or closing parenthesis . it is like if ( } Rectifying that gives the output . To be exact the error is in 77 th line before the comment /* **************************************** */ /* GETPRINCIPAL */ /* **************************************** */ hope it helps you

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