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C program to print a pascals triangle?

+3 votes
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This is pascals triangle -

Pascal Triangle

Now the task is to write a program which print this output in C?

posted Oct 6, 2014 by anonymous

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1 Answer

+1 vote
#include<stdio.h>

long fact(int);
int main(){
    int line,i,j;

    printf("Enter the no. of lines: ");
    scanf("%d",&line);

    for(i=0;i<line;i++){
         for(j=0;j<line-i-1;j++)
             printf(" ");

         for(j=0;j<=i;j++)
             printf("%ld ",fact(i)/(fact(j)*fact(i-j)));
         printf("\n");
    }
    return 0;
}

long fact(int num){
    long f=1;
    int i=1;
    while(i<=num){
         f=f*i;
         i++;
  }
  return f;
 }

Sample output:

Enter the no. of lines: 8
       1
      1 1
     1 2 1
    1 3 3 1
   1 4 6 4 1
  1 5 10 10 5 1
 1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
answer Dec 1, 2014 by Shivaranjini
Similar Questions
–1 vote

Floyd's triangle is a right-angled triangular array of natural numbers, used in computer science education. It is named after Robert Floyd. It is defined by filling the rows of the triangle with consecutive numbers, starting with a 1 in the top left corner.
Please help me how should i print the following pattern using c language.

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15

...