C++ Programmin. Please help. First part : using cout ----------------------- alw

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C++ Programmin. Please help.

First part : using cout

-----------------------

always include at the top of a code-block a display like:

// ****** First part ******

cout << "Output displayed using cout ";

USE A SIMILAR HEADER FOR ALL FOLLOWING SECTIONS.

SEE ATTACHMENT AS AN OUTPUT-STYLE EXAMPLE.

25. 25. For the first part, implement the source code to display an

output as

1 2 3 4

using cout, endl, , in the following consecutive versions:

1 – using one ‘cout‘ statement, with the numbers as one string;

2 - using one ‘cout‘ statement, with four cascaded string-inputs;

3 - repeat, using integer numbers as four inputs (you must insert

spaces as " ";

4 - repeat, using characters;

5 - using four individual ‘cout’ statements, and using only one

string at a time (insert space-separator in every string).

26. Implement the above versions one at a time:

- permanently watch the ‘Error List’, and fix the code flagged

by IntelliSense;

- save the source-file from time to time by using ‘Save All’;

- build and run one version at a time.

27. At the end of this first part, and also at the end of all

following sections, pause using:

system("pause"); // it displays: Hit any key to continue   

system("cls");

Capture the output-screen

-------------------------

28. Capture the output in a file, give it a name, and save it in your

solution-folder.

Follow the Handout instructions.

And do it after every new section that follows.

Second part : using ‘printf_s()’

--------------------------------

29. Use ‘printf_s()’ instead of cout’, for all above implementation

versions.

Before you start adding the new code, comment out the code

already implemented for ‘cout’, using the preprocessor directives

#if and #endif.

And do the same thing for all sections to be implemented next.

In the end, de-activate the two preprocessor-directives using

// in front of them, to run all implemented-sections, from the

top to the end of the project-source-code.

Here are some implementation-examples for this second ‘printf’

section:

printf("%d %d ", 1, 2); // space inside the control-string

printf("%s%s ", "1 ", "2 "); // space inside the

// displayable strings

You may also use

scanf_s("%c", &ch, 1); // to insert a “pause”

instead of system("pause");

  

Note: the old version scanf_s("%c", &ch) is no longer recommended.

Try it. You get an warning: not enough arguments passed.

Third part : display a table

----------------------------

30. Implement a source code, using ‘cout’, to display the table:

number square cube

1 1 1

2 4 8

3 9 27

with columns displayed at a TAB distance ( ):

- declare an ‘int’ variable ‘n’, initialized to 1;

- using operators ++ and * to move ‘n’ from 1 to 27

- from 1 to 2, use n++

- from 2 to 4, use n*n

- and so on.

  

Note: the ‘cube’ column doesn’t display the values right-justified.

  

Fourth part : display a triangle

--------------------------------

31. Display a triangle using ‘cout’ with only one input-string:

  

*

**

***

****

*****

Fifth part : display a rectangle

--------------------------------

32. Implement a source code, using ‘cout’, to display a rectangle:

^ ------------------

| | |

a | |

| | |

v ------------------

<--------b------->

Output example:

eIcome to C+ utput displayed using cout Inplenent code to display the output as -using e cout' statenent. with the numbers as one string 2-using one statement with four cascaded string-inputs 11 3 23 -repeat, using integer numbers as four inputs 1-repcat, using character:3 s as one string "; 1 2 3 1 using four individual cout' statenents using only one string at a tine 2 3 ng-inputs In" Press any key to continue-.. _ cout

Explanation / Answer

#include<iostream>

using namespace std;

int main(){

//30

int n=1;

cout<<"number square cube"<<endl;

for(int i=0;i<3;i++){

cout<<n<<" "<<n*n<<" "<<n*n*n<<endl;

n++;

}

return 0;

}

//31

#include<iostream>

using namespace std;

int main(){

//31

char a[100] = "*";

for(int i=1;i<=5;i++){

for(int j=0;j<i;j++){

cout<<a;

}

cout<<endl;

}

return 0;

}

//32

#include<iostream>

using namespace std;

int main(){

//32

cout<<"^ ------------------"<<endl;

cout<<"| | |"<<endl;

cout<<"a | |"<<endl;

cout<<"| | |"<<endl;

cout<<"v ------------------"<<endl;

cout<<"<--------b------->"<<endl;

return 0;

}

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