Hey im 16 and a beginner to C++ just trying to learn it on my own to get rdy for college. Now i m writing a math quiz (lol) for exercise and im wondering how to use if commands to reset/ or continue with program. For example like this
Its a little vague and wrong but i think you guys should know what im talking aboutCode:cout<<"Are you ready to begin the test? Yes/No:\n"; if ( Yes ) { continue with program } if ( No ) { reset program }
Well here is an example
Bare in mind this not a full program
You could also use a loop, to keep asking the question untill valid input is detectedCode:cout << "A re you ready to begin the test? y/n: "; cin >> answer; if ( answer == 'y' ) { cout << "Lets go!"; // test code here } else { cout << "\nOk, we'l quit..."; }
Double Helix STL
How about you pick up a book or look at tutorials about basic C++?
Im looking at tutorials of C++ trying to learn it. also swgh I know how to loop number but how would u loop those If statements? sry for acting like a newb lol
Put it in a while loop.
You can use an sentenial value. A value which is invalid, like -1;
Code:cout << "Enter a number ( Enter -1 to quit ): "; cin >> num; while ( num != -1 ) { cout << "Thanks for the number!" << endl; Enter a number ( Enter -1 ti quit ): "; cin >> num; } // break loop if -1 is used cout << "You entered: " << num << endl;
Double Helix STL
this my code so far. it keeps giving me an error when i get to cin >> num part any ideas? what am I doing wrong
Code:#include <iostream> #include <cstring> using namespace std; int main() { cout<<"Welcome to Kevin's Math quiz\n"; char name[50]; char lastname[50]; char fullname[100]; cout<<"Please enter your name: "; cin.getline ( name, 50 ); cout<<"Enter your last name: "; cin.getline ( lastname, 50 ); fullname[0] = '\0'; // strcat searches for '\0' to cat after strcat ( fullname, name ); // Copy name into full name strcat ( fullname, " " ); // We want to separate the names by a space strcat ( fullname, lastname ); // Copy lastname onto the end of fullname cout<<"Welcome "<< fullname <<"\n"; cout<<"Are you ready to begin the test? ( Enter 1 if your not rdy ):\n"; cin>> num; while ( num == 1 ) { cout << "Thank You!" << endl; Are you ready to begin the test? ( Enter 1 if your not rdy ) cin >> num } cout << "You entered: " << num << endl; cin.get(); }
where is declaration of num?
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
you mean like int num?
I tryed that but it gave me same error
This won't work:You want this:Code:while ( num == 1 )EDIT: And yes, declare int num with the rest of your variables.Code:while ( num != 1 )
And what error exactly?Originally Posted by Kevineze
All problems in computer science can be solved by another level of indirection,
except for the problem of too many layers of indirection.
– David J. Wheeler
>You want this:
>while ( num != 1 )
That is identical to my while loop example, wow!
Double Helix STL
Oh, and try to use C++ strings instead of C style character arrays
Code:string firstName; string lastName; read them with getline getline ( cin, lastName );
Double Helix STL
ok the loop worked i declared the num variable and made some other changes this is what i did. it shuts the program if u dont press 1 cuz of the cin.get() but im not done wit program yet check this out
Code:#include <iostream> #include <cstring> using namespace std; int main() { cout<<"Welcome to Kevin's Math quiz\n"; char name[50]; char lastname[50]; char fullname[100]; cout<<"Please enter your name: "; cin.getline ( name, 50 ); cout<<"Enter your last name: "; cin.getline ( lastname, 50 ); fullname[0] = '\0'; // strcat searches for '\0' to cat after strcat ( fullname, name ); // Copy name into full name strcat ( fullname, " " ); // We want to separate the names by a space strcat ( fullname, lastname ); // Copy lastname onto the end of fullname cout<<"Welcome "<< fullname <<"\n"; cout<<"Are you ready to begin the test? ( Enter 1 if your not rdy ):\n"; int num; cin>> num; while ( num == 1 ) { cout<<"Are you ready to begin the test? ( Enter 1 if your not rdy ):\n"; cin >> num; } cout << "You entered: " << num << endl; cin.get(); }
Despite the double post of the problem with this code (swgh's original and my miss of swgh's original), you still have not fixed it:Code:while ( num == 1 )
