1 #include<stdio.h>
 2 
 3 int min(int x,int y);
 4 int main()
 5 {
 6     int a=10,b=20;
 7     int c;
 8     int min(a,b);
 9     printf("%d\n",c);
10     return 0;
11 }
12 
13 
14 int min(int x,int y)
15 {
16     int z;
17     if(x>y)
18      z=y;
19     else
20      z=x;
21     return z;
22 }