Question

1. Write a C++ program, for.cpp, that reads three integers. The first two specify a range, call them bottom and top, and the other gives a step value. The program should print four sequences using for loops:

• Each value in the range from bottom to top

• Each value in the range from top to bottom, reverse counting

• Every second value in the range from bottom to top

• Every value from bottom to top increasing by step

  a: If bottom is less than top when entered, the program will exchange the two values.
  b: If step is negative, the program will be set to its absolute value (positive equivalent).

  Sample Run 1 (should have same text and spacing as in examples):

  Enter the bottom value in the range: 3
  Enter the top value in the range: 20
  Enter the step value: 6
  

  Values from 3 to 20:
  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

  Values from 20 to 3:
  20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3

  Every second value from 3 to 20:
  3 5 7 9 11 13 15 17 19
  

  Every 6th value from 3 to 20:
  3 9 15
  

Sample Run 2 (demonstrating part a and b):

Enter the bottom value in the range: 72 Enter the top value in the range: 56 Enter the step value: -4

Values from 56 to 72:
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72

Values from 72 to 56:
72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56

Every second value from 56 to 72:
56 58 60 62 64 66 68 70 72

Every 4th value from 56 to 72:
56 60 64 68 72

Answer 1

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

int main()
{
int bottom,top,step;
cout<<"Enter the bottom value in the range: ";
cin>>bottom;
cout<<"Enter the top value in the range: ";
cin>>top;
cout<<" Enter the step value: ";
cin>>step;
step=abs(step);
if(bottom>top)
{
int temp=top;
top=bottom;
bottom=temp;
}
cout<<"Values from "<<bottom<<" to "<<top<<endl;
for(int i=bottom;i<=top;i++)
{
cout<<i<<" ";
}
cout<<endl;
cout<<"Values from "<<top<<" to "<<bottom<<endl;
  
for(int i=top;i>=bottom;i--)
{
cout<<i<<" ";
}
cout<<endl;
cout<<"Every second value from "<<bottom<<" to "<<top<<endl;;
  
for(int i=bottom;i<=top;i=i+2)
{
cout<<i<<" ";
}
cout<<endl;
cout<<"Every "<<step<<"th value from "<<bottom<<" to "<<top<<endl;
  
for(int i=bottom;i<=top;i=i+step)
{
cout<<i<<" ";
}
cout<<endl;
  

return 0;
}