编写函数isprime(int a),用来判断自变量a是否为素数.若是素数,函数返回整数1，否则返回0

Question

#include<stdio.h>
int isprimte(int);
main()
{ int x;
printf("enter a integer number: ");
scanf("%d",&x);
从这里开始出错

if( isprime (x) )
printf("%d is prime\n",x);
else
printf("%d is not prime\n",x);
}
int isprime(int a)
{int i;
for(i=2;i<=a/2;i++)
if(a% i==0)
return0;
return1;
}
C:\Users\Administrator\Desktop\Untitled1.cpp In function 'int main()':
7 15 C:\Users\Administrator\Desktop\Untitled1.cpp [Error] 'isprime' was not declared in this scope
C:\Users\Administrator\Desktop\Untitled1.cpp In function 'int isprime(int)':
16 1 C:\Users\Administrator\Desktop\Untitled1.cpp [Error] 'return0' was not declared in this scope
17 1 C:\Users\Administrator\Desktop\Untitled1.cpp [Error] 'return1' was not declared in this scope
我不知道错在哪里，我在自学，请高手帮忙，我用的是Devc++，谢谢

Answer 1

using namespace std; bool isprime(int a){ if(!a||a==1) return 0; for(int i=2;i<=sqrt(a);i++) if(!(a%i)) return 0; return 1;} int main(){ int n; cin>>n; for(int i=1,m;i<=n&&cin>>m;i++) if(isprime(m)) cout<<m<<(i==n?"\n":" ");}