Why are not you displaying the 15 numbers? And how do you include 3 numbers at the beginning of this vector?
int main()
{
int v[30];
int i,x;
for(i=0; i < 15; i++)
{
printf("Digite 15 numeros");
scanf("%d", &v[i]);
}
printf("%d Os numeros escolhidos foram:", v[i]);
}