C language program to print Pascal Triangle?

Answer 1

#include <iostream.h>

double fact(double n)

{

return (n > 1) ? n * fact(n - 1) : 1;

}

double ncr(int n, int r)

{

return fact(n) / (fact(r) * fact(n - r));

}

int main()

{

for (int i = 0; i < 15; i++)

{

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

cout <<ncr(i, j) << ' '; cout << endl;

}

return 0;

}

Answer 2

#include

#include

void main()

{

int a[20][20],i,j,n,spc=25,k;

printf("\n enter the number of lines:");

scanf("%d",&n);

for(i=0;i

{

for(k=spc-2*i;k>=0;k--)

printf(" "); //to print spaces

for(j=0;j<=i;j++) //inner loop for colums

{

if(j==0i==j)

{

a[i][j]=1;

}

else

{

a[i][j]=a[i-1][j-1]+a[i-1][j];

}

printf("%4d",a[i][j]);

}

printf("\n");

}

getch();

}

The above program demonstrate pascal triangle using 2D array by normal looping.

1. #include
2. main()
3. {
4. int i,j,k;
5. clrscr();
6. printf("\n");
7. for(i=1;i<=10;i++)
8. {
9. for(j=1;j<=31-i;j++)printf(" ");
10. for(j=i,k=(2*i-1)/2+1;k;j++,k--)
11. {
12. if(j==10)j=0;
13. printf("%d",j);
14. }
15. for(j-=2,k=(2*i-1)/2;k;j--,k--)
16. {
17. if(j==-1)j=9;
18. printf("%d",j);
19. }
20. printf("\n");
21. }
22. getch();
23. }

Answer 3

#include<stdio.h>

#include<conio.h>

void main()

{

int a,row,x,y,z;

clrscr();

a=1;

y=0;

printf("Enter the number of rows for the pascal's triangle : ");

scanf("%d",&row);

while(y<row)

{

for(x=40-3*y;x>0;--x)

printf(" ");

for(z=0;z<=y;++z)

{

if((z==0)(y==0))

a=1;

else

a=(a*(y-z+1))/z;

printf("%d",a);

}

printf("\n");

++y;

}

getch();

}