C program to print pascal triangle

Programs:

#include<stdio.h>
#include<conio.h>
void main(){
int i,j,ncr=1,r,k,n;
printf("enter n volue");

scanf("%d",&n);
for(i-0;i<=n;i++){
ncr=1;
for(k=0;k<=(30-i);k++)
printf(" ");
for(j=0;j<=i;j++){
if((j==0)||(j==i))
ncr=1;
else
ncr=ncr*(i-j+1)/j;
printf("%d",ncr);
}
printf("\n");
}
getch();
}