Question

Cpp challenge

Description

The purpose of this challenge is to use the WHILE loop to control program flow. This challenge will use the WHILE loop in various ways.

Requirements

Write all your code for the following steps in one file.

1. Ask the user to enter a single string. Ask the user to enter an integer value for a variable called repetitions. Use a while loop to display this string (of your choice) repeated repetitions times, one string per line
2. Use a while loop to count and display all the integers from 1 to 20. Separate numbers with a space
3. Use a while loop to display all numbers divisible by 10 starting from 100 down to 0. Only show numbers divisible by 10. Separate numbers with a tab. TAB character is displayed using the \t escape sequence. (Remember that \n is a newline; use similarly)
4. Use a while loop to keep asking the user for an integer as long as positive numbers are being entered. For every positive number entered, show its value multiplied by 2. Once a negative number is entered stop asking and quit the loop
5. Use a while loop to keep asking for a string until a particular string is entered (for example, “bye”)

   Do Not Use

   You must use the WHILE statement. You may not use any other looping mechanism.

Sample Interaction / Output

Enter a string to be repeated: coffee
How many times to show? 5

coffee
coffee
coffee
coffee
coffee

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

100  90   80   70   60   50   40   30   20   10 

Enter a number: 3
3 x 2 = 6
Enter a number: 7
7 x 2 = 14
Enter a number: -2

Enter a string: yo
Enter a string: hi
Enter a string: hola
Enter a string: sup
Enter a string: bye

Answer 1

#include<iostream>

using namespace std;

int main(){

string txt;

int n,i;

cout<<"Enter a string to be printed: ";

cin>>txt;

cout<<"How many times to show? ";

cin>>n;

i=0;

while(i<n){

  cout<<txt<<endl;

  i++;

}

i=1;

//print 1 to 20

while(i<=20){

  cout<<i<<" ";

i++;

}

cout<<endl;

i=100;

//printing 0-100 which divisable by 10

while(i>=0){

  if(i%10==0)

    cout<<i<<" ";

  i--;

}

cout<<endl;

//reading nubmers and print *2

while(true){

  cout<<"Enter a number: ";

  cin>>n;

  if(n<0)

    break;

  cout<<n<<" * "<<"2 = "<<n*2<<endl;

  

}

//reading string until uesr gives bye

while(true){

  cout<<"Enter a string: ";

  cin>>txt;

  if(txt=="bye")

    break;

}

}

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