C PROGRAMMING PROGRAM • MATRICES

Subtract Two Matrices

Learn how to subtract two matrices using a clear C program.

Intermediate2D arraysNested loopsMatrices

PROBLEM UNDERSTANDING

Input and expected output

Sample input

Sample output

8 6
4 2

COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

int main(void)
{
    int rows, columns, first[10][10], second[10][10];

    scanf("%d %d", &rows, &columns);
    if (rows < 1 || rows > 10 || columns < 1 || columns > 10) return 1;
    for (int row = 0; row < rows; row++)
        for (int column = 0; column < columns; column++) scanf("%d", &first[row][column]);
    for (int row = 0; row < rows; row++)
        for (int column = 0; column < columns; column++) scanf("%d", &second[row][column]);
    for (int row = 0; row < rows; row++) {
        for (int column = 0; column < columns; column++) printf("%d ", first[row][column] - second[row][column]);
        printf("\n");
    }
    return 0;
}

CURRENT STEP

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EXPECTED OUTPUT FOR THE SAMPLE

8 6
4 2

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Subtract the second element from the first at every matching position.
Display the computed result.

Subtract the second element from the first at every matching position.

EFFICIENCY

Time and space complexity

Time complexity

O(rows × columns)

Auxiliary space

O(rows × columns)

DEBUGGING CHECKLIST

Common mistakes

Check this

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.