C PROGRAMMING PROGRAM • FUNCTIONS, PREPROCESSOR & COMMAND LINE

Calculate a Square Using a Function-like Macro

Learn how to calculate a square using a function-like macro using a clear C program.

Beginner#defineMacro parameterParentheses

PROBLEM UNDERSTANDING

Input and expected output

Sample input

Sample output

Square = 144

COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

#define SQUARE(value) ((value) * (value))

int main(void)
{
    int number;
    printf("Enter an integer: ");
    scanf("%d", &number);
    printf("Square = %d\n", SQUARE(number));
    return 0;
}

CURRENT STEP

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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

Square = 144

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Define a parameterized text substitution and parenthesize every use to preserve expression order.
Display the computed result.

Define a parameterized text substitution and parenthesize every use to preserve expression order.

EFFICIENCY

Time and space complexity

Time complexity

O(1)

Auxiliary space

O(1)

DEBUGGING CHECKLIST

Common mistakes

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Use the correct format specifier for every variable.

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Initialize variables before using their values.

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Check braces, semicolons and input order carefully.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.