使用函数的定义和调用

解题思路:

注意事项:

参考代码:

#include <iostream>

using namespace std;

int x=0,y;

void cst();

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) 

{

    cin>>x;

    cst(); 

    cout<<y<<endl;

    return 0;

}

void cst()

{

    if(x<1)

    {

        y=x;

    }

    if(x>=1 && x<10)

    {

        y=2*x-1;

    }

    else if(x>=10)

    {

        y=3*x-11;

    }

}