Vetor tamanho definido pelo user

    #include <stdio.h>
    #include <stdlib.h>
    #include <conio.h>
    #include <math.h>
    #include <time.h>
    #include <string.h>
    #include <windows.h>
    #include <locale.h>

    int main()
    {
        int i, x;
        int *v;

        printf("Informe o tamanho do vetor: ");
        scanf("%d", &x);
        v = (int *)malloc(x * sizeof(int));
            for (i =0; i < x; ++i)
            {
                v[i] = i;
            }
            for (i = 0; i < x; ++i)
            {
                printf("%d", v[i]);
            }
            printf("\n");
            free (v);
            return 0;
    }