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  1. // estimating the PI using Monte Carlo Simulation in C
  2. #include<stdio.h>
  3. #include<math.h>
  4. #include<stdlib.h>
  5. #include<time.h>
  6. #define SEED time(NULL)
  7. int main(){
  8.     srand( SEED );
  9.     int i, count, n;
  10.     double x,y,z,p1;
  11.     printf("n = ");
  12.     scanf("%d", &n);
  13.     count = 0;
  14.     for(i=0; i<n; i++){
  15.         x=(double)rand()/RAND_MAX;
  16.         y=(double)rand()/RAND_MAX;
  17.         z=x*x+y*y;
  18.         if(z<=1){
  19.             count++;
  20.         }
  21.     }
  22.     p1=(double)count/n*4;
  23.     printf("Approximate PI = %g", p1);
  24.     return 0;
  25. }
Success #stdin #stdout 0.01s 5288KB
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n = Approximate PI = 3
https://ideone.com/0wJkNe
language:
C++14 (gcc 8.3)
created:
13 hours ago
visibility:
public

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