Why do I get the same result with rand() every time I compile and run?

Whenever I run this code, I get a same result.

Program

#include<stdlib.h>

int main(int agrc, const char *argv[]) {
 int i = rand();
 printf("%d\n",i);
 for(i=0;i<10;i++) {
  printf("%d\n",rand());
 }
}

Result:

41
18467
6334
26500
19169
15724
11478
29358
26962
24464
5705

I ran this on mingw. Actually I am learning Objective-C

Please help me.