Skip to main content

ProwessApps

Learn · Practice · Excel
About Contact
Login / Register

WAP to calculate simple interest using default argument for rate = 20%
SIMPLE INTEREST = PRINCIPLE*TIME*RATE;

C++ Code Example — Miscellaneous Programs

ADVERTISEMENT

WAP to calculate simple interest using default argument for rate = 20%
SIMPLE INTEREST = PRINCIPLE*TIME*RATE;

Objective

Write a C++ program to calculate Simple Interest using Default Arguments.

Algorithm / Approach

  1. Define a function sim(int p, int t, int r = 20).
  2. Inside the function, calculate si = p * r * t / 100.
  3. In main(), call the function normally with 3 arguments: i.sim(1000, 3, 10).
  4. Call the function again with only 2 arguments: i.sim(1000, 3).
main.cpp 
#include<iostream>
using namespace std;
class Interest {
 public:
 void sim(int p,int t, int r = 20) {
  double si = p*r*t/100;
  cout<<"Simple Interest = "<< si;
  cout<< endl;
 }
};
int main() {
 Interest i ;
 i.sim(1000,3,10);
 i.sim(1000,3);
 return 0;
}

Expected Output

Simple Interest = 300
Simple Interest = 600

Explanation of the Program

  • Default arguments allow you to make parameters optional when calling a function.
  • If you provide all 3 arguments (e.g., rate = 10), it uses your provided rate. But if you omit the last argument, C++ automatically falls back to the default value you defined (rate = 20) instead of throwing an error.

Complexity

Time Complexity O(1)
Space Complexity O(1)
ADVERTISEMENT