assignment.c

#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>

int main(int argc, char *argv[]) {
    // initialize random number generator
    srand(time(NULL));
    int minrand = 1;
    int maxrand = 100;

    // WRITE YOUR CODE HERE
    // Check the number of arguments
    if (argc != 3) {
        printf("Incorrect usage. You provided %d arguments. The correct number of arguments is 2\n", argc - 1);
        return 1;
    }

    // Validate the arguments to ensure they are positive integers
    char *endptr1, *endptr2;
    errno = 0;
    long rows = strtol(argv[1], &endptr1, 10);
    long cols = strtol(argv[2], &endptr2, 10);

    if (*endptr1 != '\0' || *endptr2 != '\0' || errno != 0 || rows <= 0 || cols <= 0) {
        printf("Incorrect usage. The parameters you provided are not positive integers\n");
        return 1;
    }

    // Allocate memory for the matrix
    int **matrix = (int **)malloc(rows * sizeof(int *));
    if (!matrix) {
        perror("Memory allocation failed");
        return 1;
    }

    for (int i = 0; i < rows; i++) {
        matrix[i] = (int *)malloc(cols * sizeof(int));
        if (!matrix[i]) {
            perror("Memory allocation failed");
            for (int j = 0; j < i; j++) {
                free(matrix[j]);
            }
            free(matrix);
            return 1;
        }
    }

    // Fill the matrix with random numbers between 1 and 100
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            matrix[i][j] = minrand + rand() % (maxrand - minrand + 1);
        }
    }

    // Write the matrix to the file
    FILE *file = fopen("matrix.txt", "w");
    if (!file) {
        perror("Failed to open the file");
        for (int i = 0; i < rows; i++) {
            free(matrix[i]);
        }
        free(matrix);
        return 1;
    }

    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++) {
            fprintf(file, "%d", matrix[i][j]);
            if (j < cols - 1) {
                fprintf(file, " ");
            }
        }
        if (i < rows - 1) {
            fprintf(file, "\n");
        } else {
            fprintf(file, "\r");
        }
    }

    fclose(file);

    // Free the allocated memory
    for (int i = 0; i < rows; i++) {
        free(matrix[i]);
    }
    free(matrix);

    return 0;
}