//6.5 #include <iostream> #include<cctype> using namespace std; void main65() { int salary; cout<<"Enter your salary:"; cin>>salary; while(salary>=0)//&&isdigit(salary)) { if(salary<5000) cout<<"Your salary is "<<salary<<" You shouldn't!"<<endl; else if(salary<15000) cout<<"Your salary is "<<salary<<" ,Your sui is "<<salary*0.1<<endl; else if(salary<35000) cout<<"Your salary is "<<salary<<" ,Your sui is "<<salary*0.15<<endl; else cout<<"Your salary is "<<salary<<" ,Your sui is "<<salary*0.2<<endl; cout<<"Enter your salary:"; cin>>salary; } //cout<<salary<<" isdigit()"<<endl;//<<isdigit(salary)<<endl; cout<<"Finish!"; cin.get(); system("pause"); }