Looping problem

[Anmol Shrestha]

I have a question regarding the following program. This program uses 
random variables and asks the user to enter the correct sum for 5 times.
 Until, we enter an integer the program runs well but as soon as we 
enter any double value or a character, the program gives incorrect 
message for the whole loop and comes out of the loop automatically. Why 
does this happen? Can anyone help me?
#include<iostream> 
#include<ctime> 
using namespace std; 
int main() 
{ 
int num1=0; 
int num2=0; 
int correctanswer=0; 
int useranswer=0; 
srand(static_cast<int>(time(0))); 
for (int x=1; x<6; x++) 
{ 
num1=1+rand()%(100-1+1); 
num2=1+rand()%(10-1+1); 
correctanswer= num1+num2; 
cout<<"What is the sum of "<<num1<<" and "<<num2<<"?"; cin>>useranswer;
 if (useranswer==correctanswer) 
cout<<"Excellent! Correct Answer"; 
     else 
cout<<"Sorry!the correct answer is: "<<correctanswer; cout<<endl<<endl; 
} 
system("pause"); 
return 0; 
}

[Xeo]

This is the wrong forum for a general C++ debugging question. This forum is for discussing the C++ Standard.

[Ville Voutilainen]

On 24 July 2013 22:16, Xeo <hivem...@hotmail.de> wrote:

This is the wrong forum for a general C++ debugging question. This forum is for discussing the C++ Standard.

Briefly, the solution needs
http://en.cppreference.com/w/cpp/io/basic_ios/clear

because the stream is in error state as per
http://en.cppreference.com/w/cpp/io/basic_istream/operator_gtgt2

and
http://en.cppreference.com/w/cpp/concept/FormattedInputFunction
 

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[Vlad from Moscow]

The appropriate forum where you can ask such questions is www.cplusplus.com.

среда, 24 июля 2013 г., 22:29:56 UTC+4 пользователь Anmol Shrestha написал: