What’s going on in my C program?

Question

I just have to add the lines but the values don’t make sense:

Here the code:

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

int main (){

    int matriz[6][6],i,h,somalinha[6];

    for(i=0;i<=4;i++){
        for(h=0;h<=4;h++){
            printf("Digite os valores de uma matriz 3x3:\n");
            scanf("%d",&matriz[i][h]);
            somalinha[i] = somalinha[i]+matriz[i][h];
        }
        printf("O resultado da soma da linha %d eh %d\n",i,somalinha[i]);
    }

    return 0;
}

Answer 1

You forgot to initialize the vector somalinha zero values. The program is picking up memory junk.

Another detail is that you declare a 6x6 matrix, but use a 5x5 matrix in the repeat loop.

Answer 2

The code has some problems. I gave an organized and solved the problems. The include makes no sense, the array is not zero in the statement, so the sum does not occur correctly and the statement is being greater than it should be, suffice, if it is 3X3 state only this, also gave a modernized statement:

#include <stdio.h>

int main() {
    int matriz[3][3], somalinha[3] = { 0 };
    for (int i = 0; i < 3; i++) {
        for (int h = 0; h < 3; h++) {
            printf("Digite os valores de uma matriz 3x3:\n");
            scanf("%d", &matriz[i][h]);
            somalinha[i] += matriz[i][h];
        }
        printf("O resultado da soma da linha %d eh %d\n", i, somalinha[i]);
    }
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.