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  1. #include<iostream>
  2. #include<math.h>
  3.  
  4. using namespace std;
  5.  
  6. long int generateTriangleNum(int);
  7. long int factorsTriangleNum(int);
  8.  
  9. int main(){
  10.     int factors;
  11.     // cout<<"Enter no. of factors"<<endl;
  12.     // cin>>factors;
  13.     cout<<"The Triangle number is :"<<factorsTriangleNum(500)<<endl;
  14.     return 0;
  15. }
  16.  
  17. long int generateTriangleNum(int n){
  18.     long int i, sum;
  19.     sum=0;
  20.  
  21.     for(i=1;i<=n;i++)
  22.     {
  23.         sum+=i;
  24.         }
  25.  
  26.     return sum;
  27. }
  28.  
  29. long int factorsTriangleNum(int factors){
  30.     long int i, n, count, triangleNum, sqRoot;
  31.     int condition;
  32.     condition = 1;
  33.     n = 0;
  34.  
  35.     while(condition){
  36.         n++;
  37.         triangleNum = generateTriangleNum(n);
  38.         count = 0;
  39.         sqRoot = sqrt(triangleNum);
  40.         for(i=1; i<=sqRoot; i++){
  41.             if(triangleNum%i == 0){
  42.                 count++;
  43.                 if(triangleNum/i > sqRoot){
  44.                     count++;
  45.                 }
  46.             }    
  47.         }
  48.         if(count>factors){
  49.             condition = 0;
  50.         }
  51.     }
  52.     return triangleNum;
  53. }
Success #stdin #stdout 0.5s 5280KB
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Standard input is empty
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The Triangle number is :76576500
https://ideone.com/y8PoHP
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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