How to fix multiple errors in this code?

Question

I’m making a code that needs to contain 3 vectors (number one. enrollment, grade 1 and grade 2), relative to 6 students, which needs to be included:

• the final grade of each student;
• class average;
• o Núm. of students with grades below the class average.

I made the code as far as I know, but it did not compile, (some error in variable declaration vetor). And print table style as done?

#include <stdio.h>

int main ()

{
float nota1 [6], nota2 [6], nf, medturma;
  int nm [6];
int i;

for (i=0;i<=6; i++);
{
         printf("Informe o número de matrícula %d :", i);
         scanf("%d", &nm[i]);

      printf("Informe a nota 1 do aluno %d:", i);
      scanf("%f", &nota1[i]);

     printf("Informe a nota 2 do aluno %d:", i);
    scanf("%f", &nota2[i]);
}

for (i=0; i<=6; i++)
{
    nf= (nota1[i] + nota2[i])/2;
}
    printf("A nota final de cada aluno é :",i);

    medturma=nf[i]/6;
    printf("A media da turma foi %f:", i);


    if (nf<medturma)
        printf("Notas abaixo da média %f:", i);


    }

Answer 1

The question is inconsistent but I did what I could:

#include <stdio.h>

int main () {
    float nota1[6], nota2[6], nf = 0;
    int nm[6];
    for (int i = 0; i < 6; i++) {
        printf("\nInforme o número de matrícula %d:", i);
        scanf("%d", &nm[i]);
        printf("\nInforme a nota 1 do aluno %d:", i);
        scanf("%f", &nota1[i]);
        printf("\nInforme a nota 2 do aluno %d:", i);
        scanf("%f", &nota2[i]);
    }
    printf("\nMatricula Nota1 Nota2 Nota final\n");
    float notaTotalALunos = 0;
    for (int i = 0; i < 6; i++) {
        nf = (nota1[i] + nota2[i]) / 2;
        notaTotalALunos += nf;
        printf("%d         %2.2f  %2.2f  %2.2f\n", nm[i], nota1[i], nota2[i], nf);
    }
    float medturma = notaTotalALunos / 6;
    printf("A media da turma foi: %2.2f\n", medturma);
    int alunosAbaixoDaMedia = 0;
    for (int i = 0; i < 6; i++) if ((nota1[i] + nota2[i]) / 2 < medturma) alunosAbaixoDaMedia++;
    printf("Notas abaixo da média %d:", alunosAbaixoDaMedia);
 }

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

There was a huge amount of mistakes that I wouldn’t even know where to start. I’m pretty sure it still doesn’t do what it’s wanted but it’s closer. Besides, this may be a way of doing an exercise but it would never be done this way in a real program.

The style was bad and I improved but could have improved more, I didn’t want to overstate the code already written.

If you have specific questions about how each thing works, you will open specific questions.

Answer 2

Solution implemented in C++:

#include <iostream>
using namespace std;

int main(){

float n1[6],n2[6],mediaTurma = 0;
int nrMatricula[6], maxCad = 2, mediaInferior = 0 ;

for(int i = 0 ;i < maxCad;i++){
    cout << "Informe o numero de Matricula "<< i+1 << " : ";
    cin >> nrMatricula[i];
    cout << "Informe a nota da  N1: ";
    cin >> n1[i];
    cout << "Informe a nota da  N2: ";
    cin >> n2[i];
}

for(int i = 0; i < maxCad;i++){
    float mediaAluno = (n1[i] + n2[i])/2;
    cout << "No. Matricula: " << nrMatricula[i] << endl;
    cout << "Nota 01: " << n1[i] << endl;
    cout << "Nota 02: " << n2[i] << endl;
    cout << "Nota Final: " << mediaAluno << endl;
    mediaTurma += mediaAluno;
    if(mediaAluno < 7){
       mediaInferior++;
    }
 }
 cout << "A media da turma e: " << mediaTurma/maxCad << endl;
 cout << "Número de Alunos com nota final inferior a media: " <<  mediaInferior << endl;
 return 0;
}