Calculate And Show Output Of An Interest-Bearing Investment In C Language

#include <stdio.h>

#include <conio.h>

#include <math.h>

#define N 3

int main()

    int i,j;

    float irate,investment,curInterest,curInvest,totInterest=0.0;       //variable declaration

    float getIntRate();                                                 //function declaration

    float getAmount();

    float findInterest(float amt, float irate);

    irate=getIntRate();      //get the interest rate from keyboard

    investment=getAmount();  //get the investment amount from keyboard

    curInvest=investment;    //set the current investment

    for(i=1;i<=N;i++)        //loop starts upto N years

        printf(“Year : %dn”, i);                        //print the heading

        printf(“————————nn”);

        printf(“tQuarter Balance       Interest        Total Interest    Totaln”);

        printf(“t=================================================================n”);

        for(j=1;j<=4;j++)                                                                     //number of terms        

            curInterest=findInterest(curInvest,irate);                                        //find the interest rate for the current quarter

            totInterest+=curInterest;                                                                //update the total interest

            printf(“t%dt%.2ftt%.2ftt%.2ftt%.2fnn”,j,curInvest, curInterest,totInterest,(curInvest+curInterest));  //print the interest details

            curInvest=curInvest+curInterest;                             //update the final total

    system(“pause”);                                                              //wait the keyboard response from user

    return 0;

float findInterest(float amt, float irate)

    float interest;

    interest= (amt * irate) /400.0;                                                          //find the interest

    return interest;

float getIntRate()

    float interest;      

    while(1)

        printf(“Enter the interest rate : “);

        scanf(“%f”,&interest);                                                                      //read the interest rate

        if(interest>=5 && interest<=20)                                                             //check if the interest rate between 5 and

            break;                                                                                      //if the above condition is true, exit from the loop

        else

            printf(“nInvalid interest rate. It should be between 5 and 20n”);                         //else print the error message

    return interest;                   //return the interest value

float getAmount()

    float inv;      

    while(1

        printf(“nEnter the Investment Amount : “);

        scanf(“%f”,&inv);                          //read the investment amount

        if(inv>0)                                         //if the investment amount is greater than zero, if yes, exit from the loop

            break;

        else

            printf(“nInvalid investment amount. It should be greater than 0n”);    //otherwise, print the error message

    return inv;