error in C - `system' undeclared

[Milan1994]

#include <stdio.h>
#include <math.h>
#define m_d 3
int main()
{
    int i,n;
    int x[m_d];
    int m;
    printf("unesite koliko elemenata ima vas niz:\n");
    scanf("%d",&n);
    for(i=0;i<n;i++);
    {
                     printf("x[%d]=\n",i);
                     scanf("%d",&x[i]);
                     }
                     m=x[0];
                     for(i=1;i<n;i++)
                     {
                                     if(m<x[i]){
                                                  m=x[i];
                                                  }
                                                  }
                                                  printf("m je:%d\n",m);
                                                  system("pause");
                                                  return 0;
                                                  }

[aswal]

add stdlib.h header file in your program or you can use getch() instead to hold screen.