How do you write c programs to read and print out matrix and find sum and max number?

Answer 1

To write a C program that reads a matrix, prints it, and calculates both the sum and the maximum number, you can start by declaring a 2D array for the matrix. Use nested loops to input the matrix elements from the user and to print them. During the input process, maintain a variable to track the sum of all elements, as well as another variable to find the maximum value. Finally, output the sum and the maximum value after the matrix has been fully processed. Here's a simple structure:

#include <stdio.h>

int main() {
    int rows, cols;
    printf("Enter number of rows and columns: ");
    scanf("%d %d", &rows, &cols);
    
    int matrix[rows][cols], sum = 0, max = -2147483648; // Initialize max to the smallest int
    printf("Enter the matrix elements:\n");
    for (int i = 0; i < rows; i++)
        for (int j = 0; j < cols; j++) {
            scanf("%d", &matrix[i][j]);
            sum += matrix[i][j];
            if (matrix[i][j] > max) max = matrix[i][j];
        }
    
    printf("Matrix:\n");
    for (int i = 0; i < rows; i++) {
        for (int j = 0; j < cols; j++)
            printf("%d ", matrix[i][j]);
        printf("\n");
    }
    printf("Sum: %d\nMax: %d\n", sum, max);
    
    return 0;
}