Count rows and null columns of a matrix

Question

Guys, help me on the following question:

Write a complete program in C language that declares a square matrix of size 5x5. Then your program must fill this matrix randomly with 0s and 1s (the matrix generated must be different with each execution of the program). Finally, your program must inform how many null rows and columns the matrix has. Follow an example of program output. In this program the user does not provide input data. Generated matrix:

1 1 0 1 0
0 0 0 0 0
0 1 0 0 0
1 0 0 1 0
1 1 0 1 0

A matriz possui 1 linha e 2 colunas nulas!

The code I made cannot read the null rows and columns:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(int argc, char**argv){

    int matriz[5][5];
    int linha, coluna, x, count_linha, count_coluna;

    srand(time(NULL));

    printf("Matriz Gerada: \n");

    for(linha=0; linha<5; linha++){
        printf("\n");
            for(coluna=0; coluna<5; coluna++){
                x= rand() %2 + 0;
                printf("%3d",x);
                matriz[linha][coluna];
                if(linha==0){
                    count_linha++;
                }
                if(coluna==0){
                    count_coluna++;
                }
            }
    }
    printf("\n");
    printf("A matriz tem %d linhas nulas, e %d colunas nulas",count_linha, count_coluna);
}

Answer 1

As indicated in a comment by Pablo Almeida, try to separate the code into differentiated pieces (functions), each doing one thing.

For example, like this:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(int argc, char **argv) {    
    int matriz[5][5];
    int count_linha, count_coluna;

    // Primeiro: inicializar gerador de numeros aleatorios
    srand(time(NULL));

    // Segundo: preencher matriz
    for (int linha = 0; linha < 5; linha++) {
        for (int coluna = 0; coluna < 5; coluna++) {
            // int x = rand() % 2; // substitui para preencher com mais zeros
            int x = rand() % 4 - 2; if (x < 0) x = 0;
            matriz[linha][coluna] = x;
        }
    }

    // Terceiro: imprimir matriz
    printf("Matriz Gerada:\n");
    for (int linha = 0; linha < 5; linha++) {
        for (int coluna = 0; coluna < 5; coluna++) {
            printf("%3d", matriz[linha][coluna]);
        }
        printf("\n");
    }

    // Quarto: contar linhas nulas
    count_linha = 0;
    for (int linha = 0; linha < 5; linha++) {
        int zeros = 0;
        for (int coluna = 0; coluna < 5; coluna++) {
            if (matriz[linha][coluna] == 0) zeros++;
        }
        if (zeros == 5) count_linha++;
    }

    // Quinto: contar colunas nulas
    count_coluna = 0;
    for (int coluna = 0; coluna < 5; coluna++) {
        int zeros = 0;
        for (int linha = 0; linha < 5; linha++) {
            if (matriz[linha][coluna] == 0) zeros++;
        }
        if (zeros == 5) count_coluna++;
    }

    // Sexto: imprimir resultado final
    printf("A matriz tem %d linhas nulas e %d colunas nulas\n",
           count_linha, count_coluna);
    return 0;
}

You can see operating on the ideone.