Question

Objectives

• To use selection statements
• To use repetition statement

Problem Specification

Skip by 7’s and 9’s

1. Generate n numbers between -100 and 100.

2. If the value is multiple of 7 or 9, replaced by *

3. Then change to new line after the multiple of 7 or 9 is appeared

Design Specification

• Use if
• Use if … else
• Use while

Example:

Answer 1

A program to display the number between -100 and 100 by using while loop and if-else statement. If the value is multiple of 7 or 9 then print * otherwise print the number.

#include <iostream>
using namespace std;

int main()
{
//initialize the counter variable
int counter = -100;
cout<<"The list of the numbers between -100 and 100: "<<endl;
//display the list
//user of while loop
while(counter<=100)
{
//use of if and if else statement
if(counter % 7 == 0)
cout<<"*"<<endl;
else if(counter % 9 == 0)
cout<<"*"<<endl;
else
cout<<counter<<" ";
counter++;
}
return 0;
}

OUTPUT:

The list of the numbers between -100 and 100:

-100 *                                                                                                                          

*                                                                                                                               

-97 -96 -95 -94 -93 -92 *                                                                                                       

*                                                                                                                               

-89 -88 -87 -86 -85 *                                                                                                           

-83 -82 *                                                                                                                       

-80 -79 -78 *                                                                                                                   

-76 -75 -74 -73 *                                                                                                               

-71 *                                                                                                                           

-69 -68 -67 -66 -65 -64 *                                                                                                       

-62 -61 -60 -59 -58 -57 *                                                                                                       

-55 *                                                                                                                           

-53 -52 -51 -50 *                                                                                                               

-48 -47 -46 *                                                                                                                   

-44 -43 *                                                                                                                       

-41 -40 -39 -38 -37 *                                                                                                           

*                                                                                                                               

-34 -33 -32 -31 -30 -29 *                                                                                                       

*                                                                                                                               

-26 -25 -24 -23 -22 *                                                                                                           

-20 -19 *                                                                                                                       

-17 -16 -15 *                                                                                                                   

-13 -12 -11 -10 *                                                                                                               

-8 *                                                                                                                            

-6 -5 -4 -3 -2 -1 *                                                                                                             

1 2 3 4 5 6 *                                                                                                                   

8 *  

10 11 12 13 *                                                                                                                   

15 16 17 *                                                                                                                      

19 20 *                                                                                                                         

22 23 24 25 26 *                                                                                                                

*                                                                                                                               

29 30 31 32 33 34 *                                                                                                             

*                                                                                                                               

37 38 39 40 41 *                                                                                                                

43 44 *                                                                                                                         

46 47 48 *                                                                                                                      

50 51 52 53 *                                                                                                                   

55 *                                                                                                                            

57 58 59 60 61 62 *                                                                                                             

64 65 66 67 68 69 *                                                                                                             

71 *                                                                                                                            

73 74 75 76 *                                                                                                                   

78 79 80 *                                                                                                                      

82 83 *                                                                                                                         

85 86 87 88 89 *                                                                                                                

*                                                                                                                               

92 93 94 95 96 97 *                                                                                                             

*                                                                                                                               

100