Matrix Calculator in C

#include <stdio.h>

// Function to input a matrix
void inputMatrix(int matrix[][100], int rows, int cols) {
    printf("Enter matrix elements:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            scanf("%d", &matrix[i][j]);
        }
    }
}

// Function to display a matrix
void displayMatrix(int matrix[][100], int rows, int cols) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            printf("%d\t", matrix[i][j]);
        }
        printf("\n");
    }
}

// Function to add two matrices
void addMatrices(int matrix1[][100], int matrix2[][100], int result[][100], int rows, int cols) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            result[i][j] = matrix1[i][j] + matrix2[i][j];
        }
    }
}

// Function to subtract two matrices
void subtractMatrices(int matrix1[][100], int matrix2[][100], int result[][100], int rows, int cols) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            result[i][j] = matrix1[i][j] - matrix2[i][j];
        }
    }
}

// Function to multiply two matrices
void multiplyMatrices(int matrix1[][100], int rows1, int cols1, int matrix2[][100], int rows2, int cols2, int result[][100]) {
    if (cols1 != rows2) {
        printf("Matrix multiplication is not possible. Number of columns in the first matrix must be equal to the number of rows in the second matrix.\n");
        return;
    }

    for (int i = 0; i < rows1; i++) {
        for (int j = 0; j < cols2; j++) {
            result[i][j] = 0;
            for (int k = 0; k < cols1; k++) {
                result[i][j] += matrix1[i][k] * matrix2[k][j];
            }
        }
    }
}

// Function to transpose a matrix
void transposeMatrix(int matrix[][100], int rows, int cols, int result[][100]) {
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            result[j][i] = matrix[i][j];
        }
    }
}

int main() {
    int choice;
    int rows, cols;
    int matrix1[100][100], matrix2[100][100], result[100][100];

    printf("Matrix Calculator\n");

    printf("Enter the number of rows for matrix 1: ");
    scanf("%d", &rows);
    printf("Enter the number of columns for matrix 1: ");
    scanf("%d", &cols);

    printf("Enter matrix 1:\n");
    inputMatrix(matrix1, rows, cols);

    printf("Enter the number of rows for matrix 2: ");
    scanf("%d", &rows);
    printf("Enter the number of columns for matrix 2: ");
    scanf("%d", &cols);

    printf("Enter matrix 2:\n");
    inputMatrix(matrix2, rows, cols);

    while (1) {
        printf("\nMatrix Operations Menu:\n");
        printf("1. Add Matrices\n");
        printf("2. Subtract Matrices\n");
        printf("3. Multiply Matrices\n");
        printf("4. Transpose Matrix\n");
        printf("5. Display Result\n");
        printf("6. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addMatrices(matrix1, matrix2, result, rows, cols);
                printf("Matrix addition result:\n");
                displayMatrix(result, rows, cols);
                break;
            case 2:
                subtractMatrices(matrix1, matrix2, result, rows, cols);
                printf("Matrix subtraction result:\n");
                displayMatrix(result, rows, cols);
                break;
            case 3:
                multiplyMatrices(matrix1, rows, cols, matrix2, rows, cols, result);
                printf("Matrix multiplication result:\n");
                displayMatrix(result, rows, cols);
                break;
            case 4:
                transposeMatrix(matrix1, rows, cols, result);
                printf("Transpose of matrix 1:\n");
                displayMatrix(result, cols, rows);
                break;
            case 5:
                printf("Matrix 1:\n");
                displayMatrix(matrix1, rows, cols);
                printf("Matrix 2:\n");
                displayMatrix(matrix2, rows, cols);
                break;
            case 6:
                exit(0);
            default:
                printf("Invalid choice. Please try again.\n");
        }
    }

    return 0;
}