初學者的C++練習題——（三）輕信的用戶

While( user == gullible )

Requires:
variables, data types, and numerical operators
basic input/output
logic (if statements, switch statements)
loops (for, while, do-while)

Write a program that ccontinues to asks the user to enter any number other than 5 until the user enters the number 5.
Then tell the user "Hey! you weren't supposed to enter 5!" and exit the program.

#include <iostream> using namespace std; int main() { while(true) { cout << "Please enter a number other than 5: "; int input; cin >> input; if (input == 5) { cout << "Hey! you weren't supposed to enter 5!" << endl; break; } } system("pause"); }

★ Modify the program so that after 10 iterations if the user still hasn't entered 5 will tell the user "Wow, you're more patient then I am, you win." and exit.

#include <iostream> using namespace std; int main() { int count = 0; while(true) { cout << "Please enter a number other than 5: "; int input; cin >> input; if (input == 5) { cout << "Hey! you weren't supposed to enter 5!" << endl; break; } if (++count == 10) { cout << "Wow, you're more patient then I am, you win." << endl; break; } } system("pause"); }

★★ Modify the program so that it asks the user to enter any number other than the number equal to the number of times they've been asked to enter a number. (i.e on the first iteration "Please enter any number other than 0" and on the second iteration "Please enter any number other than 1"m etc. etc. The program must behave accordingly exiting when the user enters the number they were asked not to.)

#include <iostream> using namespace std; int main() { int count = 0; while(true) { cout << "Please enter a number other than " << count << ": "; int input; cin >> input; if (input == count) { cout << "Hey! you weren't supposed to enter " << count << "!" << endl; break; } if (++count == 10) { cout << "Wow, you're more patient then I am, you win." << endl; break; } } system("pause"); }