C++ Exercises: Check overflow/underflow during various arithmetical operation

Last update on August 11 2025 12:56:56 (UTC/GMT +8 hours)

Overflow and Underflow in Arithmetic

Write a C++ program to check overflow/underflow during various arithmetic operations.

Sample Solution:

C++ Code :

#include <iostream> // Including the input-output stream header file

using namespace std; // Using the standard namespace

int main() // Start of the main function
{
    cout << "\n\n Check overflow/underflow during various arithmetical operation :\n"; // Outputting a message to check overflow/underflow
    cout << " Range of int is [-2147483648, 2147483647]"<< endl; // Displaying the range of int
	cout << "---------------------------------------------------------------------\n"; // Outputting a separator line   

    int n1 = 2147483647; // Assigning the maximum range of integer to n1
    cout <<" Overflow the integer range and set in minimum range : " << n1 + 1 << endl; // Attempting to overflow by adding 1
    cout <<" Increasing from its minimum range : " << n1 + 2 << endl; // Trying to increase beyond the maximum limit
    cout <<" Product is :" << n1 * n1 << endl; // Calculating the product of n1 with itself

    int n2 = -2147483648; // Assigning the minimum range of integer to n2
    cout <<" Underflow the range and set in maximum range : " << n2 - 1 << endl; // Attempting to underflow by subtracting 1
    cout <<" Decreasing from its maximum range : " << n2 - 2 << endl; // Trying to decrease beyond the minimum limit
    cout <<" Product is : " << n2 * n2 << endl; // Calculating the product of n2 with itself

    cout << endl; // Outputting a blank line for better readability
    return 0; // Returning 0 to indicate successful program execution
} // End of the main function

Sample Output:

 Check overflow/underflow during various arithmetical operation :      
 Range of int is [-2147483648, 2147483647]                             
---------------------------------------------------------------------  
 Overflow the integer range and set in minimum range : -2147483648     
 Increasing from its minimum range : -2147483647                       
 Product is :1                                                         
 Underflow the range and set in maximum range : 2147483647             
 Decreasing from its maximum range : 2147483646                        
 Product is : 0

Flowchart:

For more Practice: Solve these Related Problems:

Write a C++ program that intentionally causes integer overflow and catches the result to demonstrate underflow behavior.
Write a C++ program that performs arithmetic operations near the limits of data types to show both overflow and underflow scenarios.
Write a C++ program to simulate overflow and underflow by performing sequential arithmetic operations on extreme values.
Write a C++ program that uses loop iterations to increment a variable until overflow occurs, then displays both the overflowed and wrapped-around values.

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C++ Code Editor:

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