Question

Suppose you want to deposit a certain amount of money into a savings account and

then leave it alone to draw interest for the next 10 years. At the end of 10 years you

would like to have $10,000 in the account. How much do you need to deposit today

make that happen? You can use the following formula, which is known as the present

value formula, to find out:

                                   P = F / (1+ r)^n

The terms in the formula are as follows:

• P is the present value , or the amount that you need to deposit today.
• F is the future value that you want in the account. (In this case, F is $10,000.)
• r is the annual interest rate .
• n is the number of years that you plan to let the money sit in the account.

Write a program that has a function named presentValue that performs this calculation.

The function should accept the future value, annual interest rate, and number of

years as arguments. It should return the present value, which is the amount that you

need to deposit today. Demonstrate the function in a program that lets the user experiment

with different values for the formula’s terms.

Answer 1

C PROGRAM (TRY TO TYPE A CODE SOME COMPILERS DOESN'T SUPPORTS COPY PASTE)

#include <stdio.h>
//function declaration
int presentValue(int,int,int);
//main function
int main()
{
//varaible declaration
int future=0,annual_intrest=0,number_of_years=0,present=0;
  
printf("Enter Future Value\n");
scanf("%d",&future);
printf("Enter annual_interest\n");
scanf("%d",&annual_intrest);
printf("Enter number of years\n");
scanf("%d",&number_of_years);
//calling a function presentValue and passing arguments and catch into a present varaible
present= presentValue(future,annual_intrest,number_of_years);
//printing present value
printf("present value = %d ",present);
return 0;
  
}

//function presentValue
int presentValue(int future,int annual_intrest,int number_of_years){
int temp=0;
//formula p=f/(1+r)^n;
temp=future/(1+annual_intrest)^number_of_years;
//function returs presentValue
return temp;
}

1 2 3 4 5 6- #include <stdio.h> //function declaration int presentValue(int,int, int); //main function int main() { //varaible declaration int future=0, annual_intrest=0, number_of_years=0, present=0; print ("Enter Future Value\n"); scan ("%d",&future); print ("Enter annual_interest\n"); scan ("%d",&annual_intrest); print ("Enter number of years\n"); scan ("%d",&number_of_years); //calling a function presentValue and passing arguments and catch into a present varaible present= presentValue(future, annual_intrest, number_of_years); //printing present value print ("present value = %d ", present); return ; 22 } 23 24 //function presentValue 25 int presentValue(int future, int annual_intrest, int number_of_years) { 26 int temp=0; 27 //formula p=f/(1+r)^n; 28 temp=future/(1+annual_intrest number of years, //function returs presentValue 30 return temp; 31 } 29

Enter Future Value 10000 Enter annual_interest 20 Enter number of years 10 present value = 470 ...Program finished with exit code o Press ENTER to exit console.O

Enter Future Value 20000 Enter annual_interest Enter number of years 10 present value = 1808 ... Program finished with exit code o Press ENTER to exit console.