Language C, matrix exercise

Question

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


int main()
{   

    int matriz[5][5];
    int i, j, posicao=0;

    int maior = matriz[0][0];
    int menor = matriz[0][0];
    int posicaoI=0, posicaoJ=0, posicaoi=0, posicaoj=0;

    srand(time(NULL));

    for(i=0; i < 5; i++){
        for(j=0; j < 5; j++){
            matriz[i][j]=rand()%101;
    }
    }

    for(i=0; i < 5; i++){
        for(j=0; j < 5; j++){
                if(matriz[i][j] > maior){
                    maior = matriz[i][j];
                    posicaoI = i;
                    posicaoJ = j;
                }
                if(matriz[i][j] < menor){
                    menor = matriz[i][j];
                    posicaoi = i;
                    posicaoj = j;
                }
            printf("(%d,%d) %d\n", i, j, matriz[i][j]);
    }
    }
            printf("Posicao (%d:%d), o maior valor é %d\n", posicaoI, posicaoJ, maior);
            printf("Posicao (%d:%d), o menor valor é %d\n", posicaoi, posicaoj, menor);
}

The highest value generated is working normal, but the lowest value ta giving 0, position (0:0).

Answer 1

Man, from what I’ve seen, you’re doing:

int matriz[5][5];   
int maior = matriz[0][0];
int menor = matriz[0][0];

That is, you are assigning a higher and lower value that can be junk memory. Eventually, the garbage stored in the larger variable may be greater than the matrix values and the same for the minimum. Try switching to:

int maior = 0;
int menor = 99999999;

I think this will work.