c语言程序一直有一个错误！

# include <stdio.h>
# include <stdlib.h>
int gcd (int,int);
int main (void)
{
int result;
result=gcd (150,35);
printf("The gcd of 150 and 35 is %i\n",result);
result=gcd (1026,405);
printf("The gcd of 1026 and 405 is %i\n",result);
printf("The gcd of 83 and 240 is %i\n",gcd (83,240));
system("PAUSE");
return 0;
}
int gcd (int u,int v)
{
int temp;
while (v!=0)
{
temp=u%v;
u=v;
v=temp;
}
return u;
}