#include <stdio.h>
void func(int n)
{
static int count=0;
count++;
 
    printf("%dは%d番目の素数\n", n, count);
}
 
int prime(int n)
{
    int i;
    int sosuu = 1;
    for(i=2; i<n; i++)
	{
        if(n%i == 0)
		{ 
           sosuu=0;
           break;
        }
    }
    return sosuu;
}
 
int main(void) 
{
    int x;
    for(int i=2; i<20;i++)
	{
        x = prime(i);
    	if (x == 1)
		{
        	func(i);	
    	}
	}
return 0;
}
 
 

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