Question

Cant figure out why my out is wrong for my c++ program.

for example if the initial value is 100, the intrest rate is 10%, and it takes 6 months for maturity the output should be $105 but instead it outputs 101.657 please help.

#include <iostream>

#include <cmath>

using namespace std;

struct account

{

double balance;

double interest_rate;

int term;

};

void info(account& accountinfo);

int main(void)

{

double calc1, calc2, calc3;

account accountinfo;

info(accountinfo);

calc1 = accountinfo.interest_rate / 100;

calc2 = accountinfo.term / 12;

calc3 = (accountinfo.balance * pow (1 + calc1 / 365, 365 / accountinfo.term));

cout << " " << endl

<< " The balance of your CD account after it has matured in " << accountinfo.term << " months " << endl

<< " at a interest rate of " << accountinfo.interest_rate << " percent will be " << calc3 << endl

<< " " << endl;

return 0;

}

void info(account& accountinfo)

{

cout << " " << endl

<< " This program calculates the value of a CD after maturity. " << endl

<< " " << endl

<< " Enter the balance on the account. " << endl;

cin >> accountinfo.balance;

cout << " " << endl

<< " Enter the interest rate for the CD. " << endl

<< " " << endl;

cin >> accountinfo.interest_rate;

cout << " " << endl

<< " Enter the term for the CD to achieve maturity (in months). " << endl

<< " " << endl;

cin >> accountinfo.term;

}

Answer 1

CODE:-

#include <iostream>

#include <cmath>

using namespace std;

struct account

{

double balance;

double interest_rate;

int term;

};

void info(account& accountinfo);

int main(void)

{

double calc1, calc2, calc3;

account accountinfo;

info(accountinfo);

calc1 = accountinfo.interest_rate/100 ;
calc2 =accountinfo.term /12.0;
calc3 = (accountinfo.balance*(1 +(calc1*calc2)));
// modification on the above line A=p(1+rt) here r=calc1 t=calc2
cout << " " << endl << " The balance of your CD account after it has matured in " << accountinfo.term << " months " << endl
<< " at a interest rate of " << accountinfo.interest_rate << " percent will be " << calc3 << endl << " " << endl;

return 0;

}

void info(account& accountinfo)

{

    cout << " " << endl
  
    << " This program calculates the value of a CD after maturity. " << endl
  
    << " " << endl
  
    << " Enter the balance on the account. " << endl;
  
    cin >> accountinfo.balance;
  
    cout << " " << endl
  
    << " Enter the interest rate for the CD. " << endl
  
    << " " << endl;
  
    cin >> accountinfo.interest_rate;
  
    cout << " " << endl
  
    << " Enter the term for the CD to achieve maturity (in months). " << endl
  
    << " " << endl;
  
    cin >> accountinfo.term;
}