**Program to print the first 10 lines of pascal's triangle** **#include <iostream.h>**

#include <conio.h>

#include <iomanip.h>

long triangle(int x,int y);

int main()

{

clrscr();

const lines=10;

for (int i=0;i<lines;i++)

for (int j=1;j<lines-i;j++)

cout << setw(2) << " ";

for (int j=0;j<=i;j++)

cout << setw(4) << triangle(i,j);

cout << endl;

getch();

}

long triangle(int x,int y)

{

if(x<0||y<0||y>x)

return 0;

long c=1;

for (int i=1;i<=y;i++,x--)

c=c*x/i;

return c;

}

This program does not take in any screen inputs from the user.

It just prints out the first ten lines of the pascal's triangle using the 'cout' command.

**Sample Output**

**1 10 45 120 210 252 210 120 45 10 1**