Segitiga Pascal

int main ()
int nilai, a, i, j, k;
print("Masukan nilai : ");
scan("%i", &nilai);
for (i=0; i<=nilai; i++);
      for (k=0; k<=((2*nilai)-(2*i)); k++) {
            print(" ");
            }
            for (j=0; j<=i; j++){
                   if (j==0||i==j) {
                       a=1;
                       }
                   else{
                       a=a*(i+1-j)/j;
                       }
            print("\n");
getch();
}