Check the Speed
The code has been modified slightly and now uploaded to the site.

34.cpp
#include <iostream>
using namespace std;
int main(){
double speed;
std::cout << "Enter the speed of the vehicle: \n";
std::cin >> speed;
if (speed < 20){
std::cout << "Too slow\n";
}
else if (speed > 80){
std::cout << "Too fast\n";
}
else {
std::cout << "Just right\n";
}
}