Pass data from one array to another

Question

How can I pass some data from one vector to another? I’m doing an exercise and I need to take several data from several students at struct and place in a vector. Then I need to check if they were approved or failed and divide into other 2 vectors.

I need a for to go through the main vector and check the notes, but how do I move other vectors and allocate the data without leaving blank spaces?

void leitura (struct medialunos vet[tf], int vet1[tf], int vet2[tf]){
    int i, j; 
    for (i=0;i<tf;i++){
        for (j=0; j<tf;j++){
            printf ("\nEntre com a matricula: ");
            scanf ("%d", &vet[i].matricula);

            printf ("\nEntre com o nome: ");
            fflush (stdin);
            fgets (vet[i].nome,20,stdin);

            printf ("\nEntre com a media final: ");
            scanf ("%lf", &vet[i].mediafinal);

            printf ("\n_____________________________________________\n");

            if (vet[i].mediafinal >= 6){
                vet1[j] = vet[i];

            else 
            vet2[j] = vet[i];
            }
        }
    }
}

Answer 1

You don’t have to make another loop to control that, loops are used to keep repeats (people don’t understand their use, for some reason they think it has to do with variables), you just need to have a loop and already a loop for it. You need to have two extra variables to control the progress of using indexes in each array. Note that I gave better names and organization in the code. This tf does not please me, I hope it is not what I am thinking (global variable).

void leitura(struct medialunos alunos[tf], int aprovados[tf], int reprovados[tf]) {
    for (int i = 0, aprovado = 0, reprovado = 0; i < tf; i++) {
        printf("\nEntre com a matricula: ");
        scanf("%d", &alunos[i].matricula);
        printf("\nEntre com o nome: ");
        fgets(alunos[i].nome, 20, stdin);
        printf("\nEntre com a media final: ");
        scanf("%lf", &alunos[i].mediafinal);
        printf("\n_____________________________________________\n");
        if (alunos[i].mediafinal >= 6) aprovados[aprovado++] = alunos[i];
        else reprovados[reprovado++] = alunos[i];
    }
}

I put in the Github for future reference.