Chapter 2, Problem 24SA

Explanation of Solution

using namespace std;
include <#ioStream>

The preprocessor commands are processed by the preprocessor before the program goes through the compiler. To use cin and cout, the program must include the header file iostream and either include the statement using namespace std; or refer to these identifiers as std::cin and std::cout. Therefore, the above statements are in the wrong order. The include preprocessor command should precede the using statement. Additionally, there are multiple errors in the include preprocessor command. All preprocessor commands start with the symbol # and the correct header file name is iostream and not ioStream (C++ is a case sensitive language). Correct statements:
#include <iostream>
using namespace std;

int main() {
(no errors)

int num1; num2;
The identifier num2 appears after the statement terminator semi-colon. Hence, the semicolon should be replaced by a comma. Correct statement;
int num, num2;

string str1;
(no errors)

cout << "Enter a string without any blanks in it ": ;
There is a colon which is intended to be part of the output string but appears after the string terminator double quotation marks. Correct statement:
cout << "Enter a string without any blanks in it :" ;

cin >> string
Multiple errors - instead of using the identifier str1, the data type string has been placed to receive the input. Also the statement terminator is missing. Correct statement:
cin >> str1;

cout << endl;
cout << "Enter two integers: ";
(no errors)

cin << num1, num2;
The first stream operator should be an extraction operator which is >> and the second stream extraction operator is missing altogether and a comma has been used instead. Correct statement:
cin >> num1 >> num2;

cout << endl;
(no errors)

return 0;
The return statement should be the last statement in any function and in this case, the main function...