Question

3. (Desk check) a. For the following program, determine the total number of items displayed as well as the first and last numbers printed #include <iostream> using namespace std; int main( int num o; while (num <20) num++: cout <num <" return 0; 248 Repetition Statements b. Enter and run the program in Exercise 3a to verify your answers to the exercise. c. How would the output be affected if the two statements in the compound statement were reversed (that is, if the cout statement came before the ++n statement)?

Answer 1

Number of iteems:

Number of items displayed based on the number of times particular loop runs.

Here loop runs from 0 to 20 that is for 0,1,2,3,..........18,19,20.

Total number of items displayed is 21.

int num=0; // initially num is 0

while(0<=20) // true  

num++; // num value is 1

cout<<num<<" "; // print 1

int num=1;

while(1<=20) // true  

num++; // num value is 2

cout<<num<<" "; // print 2

Loop : 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

outputs : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

First number printed is 1.

Last number printed is 21.