#include //Enter a integer upto ten for better output. //Try to run it at least once. /* Floyd's triangle is a right-angled triangular array of natural numbers. It is named after Robert Floyd, who was an eminent computer scientist. It is defined by filling the rows of the triangle with consecutive numbers: 1 2 3 4 5 6 7 8 9 10 */ int main() { int i,j,n,p=0; scanf("%d",&n); printf("FLOYD'S TRIANGLE\n\n# 1st Triangle\n\n");//1st triangle { for(i=0;i9)&&(p<100)) printf("%d ",p); else printf("%d ",p); } else printf (" "); } printf("\n\n"); } } p=(n*(n+1)/2)+1; printf ("\n# 2nd Triangle\n\n");//2nd for(i=1;i<=n;i++){ for(j=n;j>0;j--){ if(j>=i){ p--; if(p<10) printf ("%d ",p); else if((p>9)&&(p<100)) printf ("%d ",p); else printf ("%d ",p); } else printf (" "); } printf ("\n\n"); } p=(n*(n+1)/2)+1; printf ("\n\n# 3rd Triangle\n\n");//3rd for(i=n;i>0;i--){ for(j=n;j>0;j--){ if(j>=i){ p--; if(p<10) printf ("%d ",p); else if((p>9)&&(p<100)) printf ("%d ",p); else printf ("%d ",p); } else printf (" "); } printf ("\n\n"); } p=0; printf ("\n# 4th Triangle\n\n");//4th for(i=1;i<=n;i++){ for(j=n;j>0;j--){ if(j>=i){ p++; if(p<10) printf ("%d ",p); else if((p>9)&&(p<100)) printf ("%d ",p); else printf ("%d ",p); } else printf (" "); } printf ("\n\n"); } return 0; }

Floyd's Triangle(Challange#8)