Find Quotient and Remainder in C++

Quotient and remainder in C++ using / and %. 7/2 is 3.

BeginnerBasic ProgramsExample 13 of 14

find-quotient-and-remainder.cpp

1#include <iostream>
2using namespace std;
3
4int main() {
5    int dividend, divisor;
6    
7    cout << "Enter dividend: ";
8    cin >> dividend;
9    
10    cout << "Enter divisor: ";
11    cin >> divisor;
12    
13    // Method 1: Using division and modulus operators
14    int quotient = dividend / divisor;
15    int remainder = dividend % divisor;
16    
17    cout << "Quotient: " << quotient << endl;
18    cout << "Remainder: " << remainder << endl;
19    
20    return 0;
21}

Output

Enter dividend: 25
Enter divisor: 4
Quotient: 6
Remainder: 1

What's going on

This C++ program prints the quotient and remainder of integer division: dividend / divisor and dividend % divisor.

int dividend, divisor;

Dividend is the number being split. Divisor is how many pieces. Sample: 25 and 4.

int quotient = dividend / divisor;

Integer division. 25 / 4 is 6, not 6.25. The fraction is discarded toward zero for positive values. 7 / 2 is 3.

int remainder = dividend % divisor;

25 % 4 is 1. That's what's left after 4 goes into 25 six times.

Check: 6 * 4 + 1 == 25. For positives, quotient * divisor + remainder equals dividend. If it doesn't, you used float division somewhere.

divisor == 0 crashes (or raises a hardware exception) unless you check first. This program does not check. Don't type 0.

Negatives: C++11 truncates toward zero, so -7 / 2 is -3 and -7 % 2 is -1. Older compilers were messy. Stick to positives until that's a homework requirement.

Same idea as splitting 3665 seconds into hours and leftover seconds: divide, keep the remainder, repeat.

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