Question

Once again we will create a program that tells us how many months we need to save to reach a goal. This time however, using recursive functions. The guidelines are the following:

 In main, ask the user for the initial amount, the goal and the “monthly amount” (the constant amount of money that will be put aside every month).

 Once you have these values you should call your function. Your function should not return anything and it should accept 4 arguments. These four arguments are: the goal to reach, the current amount of money, the monthly amount that will be put aside, and the number of months passed. What do you think should be the value of months passed the first time you call the function?

 As discussed in class, your recursive function should have an if and an else. Depending on how you set up your function, one of these two will be the one that returns and ends the recursion. The other one will be the one that performs the operations and re-call the function.

 When you end the recursion make sure to display the number of months needed to reach such goal (this should go right before the return statement).

Use C code to solve this problem.

Output sample:

Which amount are you trying to reach? 1000 How much money do you currently have? 100 How much will you put aside every month? 100 The number of months you'll need is: 9

Answer 1

I solved this problem in C,see below

code.c

#include <stdio.h>

void calculate(int reach_money,int cur_money,int montly_money,int no_of_months)
{
if(cur_money>=reach_money) // if cur_money >= reach_money is base condition
{
printf("The number of months you'll need is : %d",no_of_months); // print no_of_months
return; //return
}
else
{
cur_money+=montly_money; // cur_money is incremented by montly_money

no_of_months+=1; // no_of_months is incremented by 1

return calculate(reach_money,cur_money,montly_money,no_of_months); // return calculate recursively
}
}

int main()
{
int reach_money,cur_money,montly_money,no_of_months=0; // initiallly no_of_months is 0
  
printf("Which amount you are trying to reach? ");
scanf("%d",&reach_money); // taking reach_money
  
printf("How much money do you currently have? ");
scanf("%d",&cur_money); // taking cur_money
  
printf("How much will you put aside every month? ");
scanf("%d",&montly_money); // taking montly_money
  
calculate(reach_money,cur_money,montly_money,no_of_months);//calling calculate() function

return 0;
}

Code Images:-

6 نها 1 2 #include <stdio.h> 3 4 void calculate(int reach_money, int cur_money, int montly_money, int no_of_months) 5-{ if(cur_money>=reach_money) // if cur_money >= reach_money is base condition 7. 8 printf("The number of months you'll need is : %d",no_of_months); // print no_of_months 9 return; //return 10 11 else 12 13 cur_money+=montly_money; // cur_money is incremented by montly_money 14 15 no_of_months+=1; // no_of_months is incremented by 1 16 return calculate(reach_money, cur_money,montly_money,no_of_months); // return calculate recursively } 19} } { 17 18 20

{ 20 21 int main() 22 23 int reach_money, cur_money,montly_money, no_of_months=0; // initiallly no_of_months is a 24 25 printf("Which amount you are trying to reach? "); 26 scanf("%d",&reach_money); // taking reach_money 27 28 printf("How much money do you currently have? "); 29 scanf("%d",&cur_money); // taking cur_money 30 31 printf("How much will you put aside every month? "); 32 scanf("%d",&montly_money); // taking montly_money 33 34 calculate(reach_money, cur_money,montly_money,no_of_months);//calling calculate() function 35 36 return 0; 37 } 38 www

Output Images:

Which amount you are trying to reach? 1000 How much money do you currently have? 100 How much will you put aside every month? 100 The number of months you'll need is : 9 ... Program finished with exit code o

Which amount you are trying to reach? 200 How much money do you currently have? 0 How much will you put aside every month? 1 The number of months you'll need is : 200 .. Program finished with exit code o

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