Compute the possibility of random generation - Simens

Problem

Please write out the program output.

Solution

Actually, it requires to compute (Pi * R² / 4) / R² * LOOP. So it is reasonable to give any number around 1000 * Pi / 4

include <stdio.h>

#include <stdlib.h>

#include <time.h>

#define LOOP 1000

void main()

{

int rgnC = 0;

//srand((unsigned)time(NULL));

for(int i = 0; i < LOOP; i++){

int x = rand();

int y = rand();

if( x*x + y * y < RAND_MAX * RAND_MAX){

rgnC ++;

}

}

printf("%d\n", rgnC);

}

Output

778