ED - arquivo bin - uso do fseek

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

//uso do fseek
int main()
{
    FILE *fp;
    int i;
    int num[20];
    int vet[5];

    for(i=0;i<20;i++)
        num[i]=i; num[i]=i;
    fp=fopen("vetBin.bin","wb"); //gravação binario (gera novo arq)
    fwrite(num, sizeof(int),20,fp);
    fclose(fp);

    fp=fopen("vetBin.bin","rb");
    fseek(fp,-5*sizeof(int),SEEK_END);//SEEK_CUR ou SEEK_SET
    fread(vet, sizeof(int),5,fp);
    printf("\nVetor resultante\n");
    for(i=0; i<5;i++)
        printf("%d\t",vet[i]);
    printf("\n\n");

    system("pause");
    return 0;
}