Problems when printing the file of ordered numbers

Well, good night, I'm having a problem with this algorithm, so please enlighten me with your knowledge. I apologize in advance if it is difficult to understand the code, I am still in the second period.

  

The goal of the algorithm is:

Generate a vector with n random numbers and save them to a file, sort these numbers according to the option given in a procedure that asks the type of ordering desired, and finally print the numbers of the vector in another file, only which this time properly ordered.

  

The problem is:

At the time of printing files with sorted numbers, where one file should contain the random numbers and the other file the same numbers, only ordered but they are not sorting.

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

#define TAM 5000

void opcoes();
void CV(int *n);                                            //Criar vetor                                                 
void OV(int *n, int opcao, int ini, int fim);               //Ordenar vetor         
int PV(int *n, int ini, int fim);                           //Particionar vetor         
void IV(int *n);                                            //Imprimir vetor            

int main(){
    srand(time(0));
    setlocale(LC_ALL,"Portuguese");

    int t, i, n[TAM], ini=i, fim=TAM-1;

    opcoes();
    t=clock();
    CV(n);
    OV(n,0,ini,fim);
    IV(n);
    t=clock()-t;

    printf("\nTempo de processamento: %0.3f segundos.\n",(float)(t)/CLOCKS_PER_SEC);
    return 0;
}

  

Procedure to select a particular sort order:

void opcoes(){
    int opcao;

    do{
    printf("\nDigite a opção do algoritmo de ordenação: \n\n1 - BUBBLE SORT\n2 - INSERTION SORT\n3 - SELECTION SORT\n4 - QUICK SORT\n\n");
    scanf("%d",&opcao);
    }while((opcao<1)||(opcao>4));
}

  

Procedure to create vector:

 void CV(int *n){
    int i; FILE *A;

    A=fopen("A.txt","r");
    if(A==NULL){
        printf("\n\"A.txt\" inexistente, criando arquivo.\n");
        fclose(A);

            A=fopen("A.txt","w");
            for(i=0;i<TAM;i++){
                n[i]=rand()%10000+1;
                //printf("%d ",n[i]);
                fprintf(A,"%d ",n[i]);
            }
    fclose(A);
    }
fclose(A);
}

  

Procedure to sort the vector, according to the option given in the Options procedure:

void OV(int *n, int opcao, int ini, int fim){
    int i, j, pivo, sel, aux;

    switch(opcao){

        case 1:                                     //bubble sort
            for(i=0;i<TAM;i++){
                for(j=0;j<TAM-1;j++){
                    if(n[j]<n[j+1]){
                        aux=n[j];
                        n[j]=n[j+1];
                        n[j+1]=aux;
                    }
                }
            }
        break;

        case 2:                                     //insertion sort
            for(i=1;i<TAM;i++){
                aux=n[i];
                for(j=i-1;(j>=0)&&(aux>n[j]);j--){
                    n[j+1]=n[j];
                }
                n[j+1]=aux;
            }
        break;

        case 3:                                     //selection sort
            for(i=0;i<TAM-1;i++){
                sel=i;
                for(j=i+1;j<TAM;j++){
                    if(n[j]<n[sel]){
                    sel=j;
                    }
                }
                if(i!=sel){
                    aux=n[i];
                    n[i]=n[sel];
                    n[sel]=aux;
                }
            }
        break;

        case 4:                                     //quick sort
            if(ini<fim){
                pivo=PV(n,ini,fim);
                OV(n, opcao, ini, pivo-1);
                OV(n, opcao, pivo+1,fim);
            }
        break;  
    }
}

  

Function that partitions the vector in case of a bubble sort :

int PV(int *n, int ini, int fim){
    int pivo=n[ini], i=ini,  j, aux;

    for(j=ini+1;j<=fim;j++){
        if(n[j]>=pivo){
            i++;
            aux=n[i];
            n[i]=n[j];
            n[j]=aux;
        }
    }
    aux=n[i];
    n[i]=n[ini];
    n[ini]=aux;

    return i;
}

  

Procedure to print the vector (in an ordered thesis), in another file.

void IV(int *n){
    int i; FILE *OA;

    OA=fopen("Ordenado-A.txt","r");
    if(OA==NULL){
        printf("\n\"Ordenado-A.txt\" inexistente, criando arquivo.\n");
        fclose(OA);

        OA=fopen("Ordenado-A.txt","w");
        for(i=0;i<TAM;i++){
            fprintf(OA,"%d ",n[i]);
            //printf("%d ",n[i]);
        }
        fclose(OA);
    }
    fclose(OA);
}