C PROGRAMMING PROGRAM • MATRICES

Add Two Matrices

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

Intermediate2D arraysNested loopsMatrices

PROBLEM UNDERSTANDING

Input and expected output

Sample input

Sample output

6 8
10 12

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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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

6 8
10 12

0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Add elements at identical row and column positions.
Display the computed result.

Add elements at identical row and column positions.

EFFICIENCY

Time and space complexity

Time complexity

O(rows × columns)

Auxiliary space

O(rows × columns)

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.