Question

Can i get a help with this lab please!

Lab 3 - Decision Making V < Listen OBJECTIVES FOR STUDENT • To work with relational operators • To work with conditional statements if if else, if else if, and switch Notes • The lab is due, October 14, 2020, at 9am. . If you complete the lab before the deadline, send me an email and I can give you feedback . Please update your files to the Lab 3 Dropbox Part 1: (25%) Relational Operators Write a C++ program. Lab31.cpp, that takes a single integer as input from the keyboard and decides whether that integer is less than, equal to or greater than zero. The program should then print the appropriate message to the display. Use if-else control.

Answer 1

Source code of the programs are given below.Detailed comments are included for better understanding the code.Screen shot of the code and output are also attached.If find any difficulty, feel free to ask in comment section. Please do upvote the answer.Thank you.

1) Source code

#include<iostream>
using namespace std;
int main()
{
//declaring integer variable to hold user input
int number;
//prompt user to enter the integer
cout<<"Enter the integer: ";
//read the integer
cin>>number;
//check the integer is less than zero
if(number<0)
cout<<"The number "<<number<<" is less than zero";
//else if check the integer is greater than zero
else if (number>0)
cout<<"The number "<<number<<" is greater than zero";
//if both if is not true,then the integer is zero
else
cout<<"The number is zero";
return 0;
}

Screen shot of the code

1 #include<iostream> 2 using namespace std; 3 int main() 49 { 5 //declaring integer variable to hold user input 6 int number; 7 //prompt user to enter the integer 8 cout<<"Enter the integer: "; 9 //read the integer 10 cin>>number; 11 //check the integer is less than zero 12 if (number<0) 13 cout<<"The number "<<number<<" is less than zero"; 14 //else if check the integer is greater than zero else if (number>0) 16 cout<<"The number "<<number<<" is greater than zero"; 17 //if both if is not true, then the integer is zero 18 else 19 cout<<"The number is zero"; 20 return 0; 21 } 15

Screen shot of the output

.

C:\Users\HP\Desktop\codes\cppprogram Enter the integer: -7 The number -7 is less than zero Process exited after 21.99 seconds Press any key to continue

2)Source code

#include<iostream>
using namespace std;
int main()
{
//declaring integer variable to hold grade
int grade;
//prompt user to enter the grade
cout<<"Enter the numeric grade: ";
//read the grade
cin>>grade;
//check the grade is in between 85 and 100
if(grade>=85 && grade<=100)
cout<<"Corresponding letter grade: "<<"A";
//else if check the grade is in between 65 and 84
else if (grade>=65 && grade<=84)
cout<<"Corresponding letter grade: "<<"B";
//else if check the grade is in between 55 and 64
else if (grade>=55 && grade<=64)
cout<<"Corresponding letter grade: "<<"C";
//else if check the grade is in between 50 and 54
else if (grade>=50 && grade<=54)
cout<<"Corresponding letter grade: "<<"D";
//else if check the grade is in between 0 and 49
else if (grade>=0 && grade<=49)
cout<<"Corresponding letter grade: "<<"E";
//otherwise the grade is not in the range in between 0 and 100
else
   cout<<"invalid input";
return 0;
}

Screen shot of the code

11 q2.cpp 1 #include<iostream> 2. using namespace std; 3 int main() 49 { 5 //declaring integer variable to hold grade 6 int grade; 7 //prompt user to enter the grade 8 cout<<"Enter the numeric grade: "; 9 //read the grade 10 cin>>grade; //check the grade is in between 85 and 100 12 if(grade>=85 && grade<=100) 13 cout<<"Corresponding letter grade: "<<"A"; 14 //else if check the grade is in between 65 and 84 15 else if (grade>=65 && grade<=84) 16 cout<<"Corresponding letter grade: "<<"B"; 17 //else if check the grade is in between 55 and 64 18 else if (grade >=55 && grade<=64) 19 cout<<"Corresponding letter grade: "<<"C"; 20 //else if check the grade is in between 50 and 54 21 else if (grade >=50 && grade<=54) 22 cout<<"Corresponding letter grade: "<<"D"; 23 //else if check the grade is in between 0 and 49 24 else if (grade>=0 && grade<=49) cout<<"Corresponding letter grade: "<<"E"; 26 //otherwise the grade is not in the range in between 0 and 100 27 else 28 cout<<"invalid input"; return 0; 30 } 25 29

Screen shot of the output

C:\Users\HP\Desktop\codes\cppprogram Enter the numeric grade: 63 Corresponding letter grade: C Process exited after 18.95 seconds Press any key to continue ..

3)Source code

#include<iostream>
using namespace std;
int main()
{
//declaring integer variable n to hold day number
int n;
//prompt user to enter number
cout<<"Enter the number: ";
//reading number n
cin>>n;
//switch statement compare n with each case values
//whenever a match is found,the associated statement block will be executed
switch(n)
{
   case 1:
       cout<<"Sunday";
       break;

   case 2:
       cout<<"Monday";
           break;
  
   case 3:
       cout<<"Tuesday";
           break;

   case 4:
       cout<<"Wednesday";
           break;

   case 5:
       cout<<"Thursday";
           break;

   case 6:
       cout<<"Friday";
           break;

   case 7:
       cout<<"Saturday";
           break;
   //if no match found print invalid number
   default:
       cout<<"Invalid number!!";
           break;
}
return 0;
}

Screen shot of the code

1 #include<iostream> 2 using namespace std; 3 int main() 45 { 5 //declaring integer variable n to hold day number 6 int n; 7 //prompt user to enter number 8 cout<<"Enter the number: "; 9 //reading number n 10 cin>>n; 11 // switch statement compare n with each case values 12 // whenever a match is found, the associated statement block will be executed 13 switch(n) 14 { 15 case 1: 16 cout<<"Sunday"; 17 break; 18 19 case 2: 20 cout<<"Monday"; break; 22 23 case 3: 24 cout<<"Tuesday"; 25 break; 26 27 case 4: 28 cout<<"Wednesday"; 29 break; 30 31 case 5: 32 cout<<"Thursday"; 33 break; 21

34 35 36 case 6: cout<<"Friday"; break; 37 38 39 40 41 42 43 44 45 46 47 case 7: cout<<"Saturday"; break; //if no match found print invalid number default: cout<<"Invalid number!!"; break; } return 0; 10

Screen shot of the output

C:\Users\HP\Desktop\codes\cppprogram Enter the number: 4 Wednesday Process exited after 11.06 seconds Press any key to continue

4)Source code

#include<iostream>
using namespace std;
int main()
{
//declaring integer variable n to hold frequency of wave
int f;
//prompt user to enter frequency of wave
cout<<"Enter the frequency of wave: ";
//reading frequency f
cin>>f;
//if frequency is in between 3 and 30 print extremely low frequency
if(f>=3 && f<=30)
   cout<<"Extremely low frequency";
//else if frequency is in between 31 and 300 print super low frequency
else if(f>=31 && f<=300)
   cout<<"Super low frequency";
//else if frequency is in between 301 and 3000 print ultra low frequency
else if(f>=301 && f<=3000)
   cout<<"Ultra low frequency";
//else if frequency is in between 3001 and 30000 print very low frequency
else if(f>=3001 && f<=30000)
   cout<<"Very low frequency";
//else if frequency is in between 30001 and 300000 print low frequency
else if(f>=30001 && f<=300000)
   cout<<"Low frequency";
//otherwise print invalid input
else
   cout<<"Invalid input!!";
return 0;
}

Screen shot of the program

11 1 #include<iostream> 2 using namespace std; 3 int main() 4 { 5 //declaring integer variable n to hold frequency of wave 6 int f; 7 //prompt user to enter frequency of wave 8 cout<<"Enter the frequency of wave: "; 9 //reading frequency f 10 cin>>f; //if frequency is in between 3 and 30 print extremely low frequency 12 if(f>=3 && f<=30) 13 cout<<"Extremely low frequency"; 14 //else if frequency is in between 31 and 300 print super low frequency 15 else if(f>=31 && f<=300) 16 cout<<"Super low frequency"; 17 //else if frequency is in between 301 and 3000 print ultra low frequency 18 else if(f>=301 && f<=3000) cout<<"Ultra low frequency"; 20 //else if frequency is in between 3001 and 30000 print very low frequency 21 else if (f>=3001 && f<=30000) 22 cout<<"Very low frequency"; 23 //else if frequency is in between 30001 and 300000 print low frequency 24 else if (f>=30001 && f<=300000) 25 cout<<"Low frequency"; 26 //otherwise print invalid input 27 else 28 cout<<"Invalid input!!"; 29 return 0; 30 } 19

Screen shot of the output

C:\Users\HP\Desktop\codes\cppprogram Enter the frequency of wave: 2000 ultra low frequency Process exited after 19.95 seconds Press any key to continue .