"C + + Primer plus English version Sixth edition" Chapter 5

Chapter Review

1
An entry-condition loop evaluates a test expression before entering the body of the loop. If the condition is initially false , the loop never executes its body. An exit-condition loop evaluates a test expression after processing the body of the loop. Thus, the loop body is executed once, even if the test expression is initially false . for while The and loops are entry-condition loops, and the do while loop was an exit-condition loop.
2
It would print the following:

01234    

Not, that is cout << endl; , the loop body (because there is no braces).

3
It would print the following:

0369    12    

4
It would print the following:

6    8    

5
It would print the following:

8;

6
It ' s simplest to use the *= operator:

for  (int  num = 1 ; Num <= 64 ; Num *= 2 ) cout << num << ;  

7
You enclose the statements within paired braces to form a single compound statement, or block.
8
Yes, the first statement is valid. The expression 1,024 consists of the expressions-1 and 024-joined by a comma operator. The value of the right-hand expression. This is 024, which are octal for a, so the declaration assigns the value 20 to x . The second statement is also valid. However, operator precedence causes it to be evaluated as follows:
(y = 1), 024;
That's, the left expression sets y 1 to, and the value of the entire expression, which isn't used, is 024 , or c7/>.
9
The cin >> ch form skips over spaces, newlines, and tabs when it encounters them. The other and the forms read those characters.

Programming Exercises1

#include <iostream>int main(){    usingnamespace std;        int n1, n2;    int0;        "Input two integer numbers (example: 2 9): ";    cin >> n1;    cin >> n2;        for (int i = n1; i <= n2; ++i)    {        sum += i;    }    "sum = " << sum << endl;        return0;}

2

#include <iostream>#include <array>Const intArsize =101;intMain () {using namespaceStd array<Long Double, arsize> factorials; factorials[1] = factorials[0] =1.0L; for(inti =2; i < arsize; ++i) {Factorials[i] = i * factorials[i-1]; } for(inti =0; i < arsize; ++i) {cout << i <<"! = "<< Factorials[i] << Endl; }return 0;}

3

#include <iostream>int main(){    usingnamespace std;        double x;    double0.0;        cin >> x;    while0.0)    {        sum += x;        cin >> x;    }    "sum = " << sum << endl;        return0;}

4

#include <iostream>int main(){    usingnamespace std;        double d, c;    100.0;       int i;    for0; d >= c; ++i)    {        0.1100.0;        1.05;    }        " year(s)\n";    "Daphne: " << d << endl;    "Cleo: " << c << endl;        return0;}

5

#include <iostream>Const Char*Constmonths[ A] ={"January","February","March","April","may","June","July","August","September","October","November","December"};intMain () {using namespaceStdintvolumes[ A];intsum =0; for(inti =0; I < A; ++i) {cout <<"Enter The sales volume of"<< Months[i] <<": ";    CIN >> Volumes[i]; } for(inti =0; I < A;        ++i) sum + = Volumes[i]; cout <<"Sum ="<< sum << Endl;return 0;}

6

#include <iostream>Const Char*Constmonths[ A] ={"January","February","March","April","may","June","July","August","September","October","November","December"};intMain () {using namespaceStdintvolumes[3][ A];intsum =0;intTotal =0; for(inti =0; I <3; ++i) {cout <<"Enter the sales volumes of year:"<< i +1<< Endl << Endl; for(intj =0; J < A; ++J) {cout <<"Enter The sales volumes of"<< Months[j] <<": ";        CIN >> Volumes[i][j]; }            } for(inti =0; I <3; ++i) { for(intj =0; J < A;        ++J) {sum + = volumes[i][j]; } cout <<"Sales volume of Year"<< i +1<<"is"<< sum << Endl;        Total + = sum; sum =0; } cout <<"Sales volumes of 3 years is:"<< Total << Endl;return 0;}

7

#include <iostream>structcar{Charmake[ +];intyear;};intMain () {using namespaceStdintNum        Car * cars; cout <<"How many cars does you wish to catalog:";    CIN >> Num; Cars =NewCar[num]; for(inti =0; i < num; i++) {cout <<"Car #"<< i +1<<":\ n"; cout <<"Please enter the Make:";//cin >> cars[i].make;Cin.getline (Cars[i].make, +);        Cin.get (); cout <<"Please enter the year made:";    Cin >> Cars[i].year; } cout <<"Here is your collection:\ n"; for(inti =0; i < num; ++i) cout << cars[i].year <<" "<< Cars[i].make << Endl;Delete[] cars;return 0;}

8

#include <iostream>#include <cstring>int main(){    usingnamespace std;        char word[20];    int0;        "Enter word (to stop, type the word done):\n";    cin >> word;    while"done"))    {        ++count;        cin >> word;    }    "You entered a total of "" words.\n";        return0;}

9

#include <iostream>#include <string>int main(){    usingnamespace std;        string word;    int0;        "Enter word (to stop, type the word done):\n";    cin >> word;    while"done")    {        ++count;        cin >> word;    }    "You entered a total of "" words.\n";        return0;}

10

 #include <iostream>  int  Main () {using  namespace  std;    cout <<  "Enter number of rows:" ;    int  N;    CIN >> N; for  (int  i = 0 ; i < n; ++i)    //row  {for  (int  j = 0 ; j < n; ++j) //column  if  (J < (n-(i + 1 )))            cout << ;                else  cout << ;    cout << Endl; } return  0 ;}  

C + + Primer plus the sixth edition of the English version Chapter 5