C++ :

#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cmath>
using namespace std;
int a=17,b=6;
int main(){
    int mul,div,mod; double rdiv;
    mul=a*b;
    div=a/b;
    mod=a%b;
    rdiv=1.0*a/b;
    b=b+10;
    b=b+20;
    a=a-3;
    a=a-5;
    cout<<"a*b="<<mul<<endl;
    cout<<"a/b="<<div<<endl;
    cout<<"a%b="<<mod<<endl;
    cout<<"1.0*a/b="<<rdiv<<endl;
    cout<<"b="<<b<<endl;
    cout<<"a="<<a<<endl;
    
    // freopen("2465.out","w",stdout);
    //printf("a*b=%d\n",a*b);
    //printf("a/b=%d\n",a/b);
    //printf("a%b=%d\n",a%b);
    //printf("1.0*a/b=%lf\n",1.0*a/b);
    //printf("b=%d\n",b+10+20);
    //printf("a=%d\n",a-3-5);
//    system("pause");
    return 0;
}