// passing the entire array to the function.#include <stdio.h>void read_matrix(int mat[5][5], int r) { int i, j; for (i = 0; i < r; i++) { for (j = 0; j < r; j++) { if (i == j) { mat[i][j] = 0; } else if (i > j) { mat[i][j] = -1; } else { mat[i][j] = 1; } } };}void display_matrix(int mat[5][5], int r) { int i, j; for(i=0; i<r; i++) { printf("\n"); for(j=0; j<r; j++) { printf("\t %d", mat[i][j]); } };}int main(){ int row; int mat1[5][5]; printf("\n Enter the number of rows and columns of the matrix:"); scanf("%d", &row); read_matrix(mat1, row); display_matrix(mat1, row); return 0;}