为什么我这串代码运行不了(语言-c++)

Question

**

#include <iostream>
using namespace std;

int void swap (int num1 ,int num2){
int temp =num 1;
num2=temp;
num1=num2;
cout << "交换以后的值"<<num 1<<"  " <<num2<<endl;

cout << "交换以后的值"<<num 1<<"  " <<num2<<endl;






}
int main(){
    
    int a =10;
    int b =20;
    swap (a,b);
    
    
    
    
}
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```**

Answer 1

简单修改了一下，望采纳

#include <iostream>
using namespace std;
int swap(int num1,int num2){
    int temp; 
    temp=num1;
    num1=num2;
    num2=temp;
    return 0;
}
int main()
{
    int a=10;
    int b=20;
    swap(a,b); 
    cout <<"交换以后的值"<<a<<"  " <<b<<endl;
    return 0;
}