Sorting algorithm does not work

Question

Something is missing in the program. It checks the order with a single number or a single time.

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

  /*4)escrever 10 números e ordenar em forma crescente e decrescente*/

int main()
{
    int opc;
    int numA=0, numB=0, numC=0, soma, aux=0, i;
    int vet[10];
    float media;

    printf("escolha qual exercicio quer executar:\n1)Ex1\n2)Ex2\n3)Ex3\n4)Ex4\n");
    scanf("%i", &opc);

    fflush(stdin);
    system("cls");

    switch(opc)
    {
    case 4:

        printf("digite 10 numeros aleatorios:\n");

        /*inicio da fase de processamento*/
        for(i=0; i<10; i++)
        {
            scanf("%i", &vet[i]);
        }


    for(i=0; i<10; i++)/*crescente*/
    {
        if(vet[i]>vet[i+1])
        {
            aux=vet[i];
            vet[i]=vet[i+1];
            vet[i+1]=aux;
        }

        printf("%i", vet[i]);
    }

        /*fim da fase de processamento*/

        break;

    default:
        break;
    }

    return 0;
}

Answer 1

The way you’re doing is just exchanging between two elements, but you don’t keep making the exchange between all the elements. There are several ways to solve this. To compare all the elements in a simple way it is necessary to make two loops to compare each element with all the others.

#include <stdio.h>

int main(void) {
    int vet[10];
    int aux;
    for (int i = 0; i < 10; i++) scanf("%i", &vet[i]);
    for (int i = 0; i < 10; i++) {
        for (int j = i + 1; j < 10; j++) { 
            if(vet[i] > vet[j]) {
                aux = vet[i];
                vet[i] = vet[j];
                vet[j] = aux;
            }
        }
        printf("%i", vet[i]);
    }
}

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