#include <stdio.h>
//課題2
int prime(int n){
int i,count=0;
for (i=2; i<n; i++){
if (n%i == 0) count +=1;}
if (count != 0)
return 0;
else
return 1;
}
int main(void) {
int a;
if (prime(a)== 1 )
else
return 0;
}
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