Question

1. Write a C++ program that sets the maximum speed limit as a constant integer to be 120 Km/Hour. The program should read from the user an integer value representing the speed of a car. Use a nested if else to display a message based on the input speed:

Speed < 10                      display      “Invalid speed”

10 <= Speed <= 120       display      “Speed is within limit”

Speed > 120                    display      “Speed limit exceeded”

At the end the program should display a message “Thank you for using the program”.

Answer 1

Please find the code below with all comments and explaination also attached execution screenshot below

#include <bits/stdc++.h> 
using namespace std; 

int main()
{
  //Initialising the const int maximum_speed_limit with 120 kmph and declaring the vaiable input_speed to read from user
    const int maximum_speed_limit = 120;
    int input_speed ;

    //reading user speed into input_speed
    cout << "Please enter the speed: \n" ;
    cin >>  input_speed ;

//checking the condition that input_speed is less than 10 or not if yes then we will output invalid speed
    if(input_speed < 10)
    {
      cout << " Invalid speed \n" ;
    }

    //checking the condition that input_speed is greater than 10
    else if (input_speed >= 10 )
    {
      //checking the condition that input_speed is less than maximum_speed_limit or not if yes then we will output speed is within limit
      if (input_speed <= maximum_speed_limit)
      {
        cout << " Speed is within limit \n";
      }

      //else we will output speed limit exceeded
      else
      {
        cout << " Speed limit exceeded \n";
      }
    }

//at the end we will output  thank you for using the program
    cout << " Thank you for using the program";
    
}

Screenshot 1 : speed < 10

screenshot 2: speed between 10 and 120 (both inclusively)

screenshot 3 : speed > 120