Need help with a C++ program, I need to know how to make the program end when the statement is false?

#include %26lt;iostream%26gt; //Required for all C++ programs


#include %26lt;iomanip%26gt; //Part of the standard library for input/output, required for setw function


using namespace std;





int main() // Beginning of program


{


int choice;


double seconds,answer;


double speed;


bool validInput = true;





cout %26lt;%26lt; "\t\tMenu\n";


cout %26lt;%26lt; "---------------------------------------...


cout %26lt;%26lt; "1. Carbon Dioxide" %26lt;%26lt; endl;


cout %26lt;%26lt; "2. Air" %26lt;%26lt; endl;


cout %26lt;%26lt; "3. Helium" %26lt;%26lt; endl;


cout %26lt;%26lt; "4. Hydrogen" %26lt;%26lt; endl;


cout %26lt;%26lt; endl;


cout %26lt;%26lt; "Please select one of the gases from the list." %26lt;%26lt; endl;


cout %26lt;%26lt; "Enter your choice, 1-4: ";


cin %26gt;%26gt; choice;


cout %26lt;%26lt; endl;





if (choice %26lt;=0 || choice %26gt;=5)





cout %26lt;%26lt; "You did not choose a correct number please try again." %26lt;%26lt; endl;


else


(choice %26gt;=1 || choice %26lt;=4);





cout %26lt;%26lt; "Enter the time in seconds that the soundwave traveled between 1-30: ";


cin %26gt;%26gt; seconds;


cout %26lt;%26lt; endl;





if (seconds %26lt; 0 || seconds %26gt; 30)





cout %26lt;%26lt; "Sor

Need help with a C++ program, I need to know how to make the program end when the statement is false?
You have more than one area in which the user enters a choice, If you are asking how do you end your program at a point in which the user has entered invalid information,





switch your





if (choice %26lt;=0 || choice %26gt;=5)


cout %26lt;%26lt; "You did not choose a correct number please try again." %26lt;%26lt; endl;


To:


if(choice %26lt;=0 || choice %26gt;= 5)


{


cout %26lt;%26lt; "You entered invalid information" %26lt;%26lt; endl;


return 0;


}





The bottom switch statement you would add:





default:


cout %26lt;%26lt; "You entered invaid number" %26lt;%26lt; endl;


return 0;








Anytime you return from main, the program is over.
Reply:first of all you need a default case in your switch down at the bottom, but what statement are you talking about?