C++ Programming

Operators: Following are the mostly used operators of C++: 1. And operator (denoted by &&) 2. Or operator (dented by ||) 3. Not operator (denoted by !) 4. Modulus operator (denoted by %)

if-else & if-else-if Programs: Program: #include < iostream > using namespace std; int main() { int a; cin >> a; if(a == 5) { cout << "Yes, the number is 5" << endl; } else { cout << "No; the number is not 5" << endl; } return 0; } Program 2: #include < iostream > using namespace std; int main() { int a; cin >> a; if (a == 1) { cout << "1" << endl; } else if (a == 2) { cout << "2" << endl; } else { cout << "none" << endl; } return 0; }

if-else codition: Syntax: if (condition) { } else { } if-else-if codition: if (condition) { } else if (condition) { } else { }

Swapping of Variables: Swapping: Swapping of variables means Interchanging the values of variables Program: #include < iostream > using namespace std; int main() { int a = 10; int b = 20; int c; c = a; a = b; b = c; cout << a << " " << b << endl; return 0; }

To get 2 inputs from the user whose result is getting by using Exponentials: Program: #include < iostream > using namespace std; int main() { int a , b , p = 1; cout << "Enter base = "; cin >> a; cout << "Enter Power = "; cin >> b; for (int k = 1; k <= b; k++) { p = p * a; cout << "The result is = " << p << endl; } return 0; }

Sum of Different Numbers: Program: #include < iostream > using namespace std; int main() { int a; int sum=0; for(int k = 0; k < 5; k++) { cin >> a; sum = sum + a; cout << "The sum = " << " " << sum << endl; } return 0; }

Programs to give numbers with the output according to the loop: #include < iostream > using namespace std; int main() { for(int j = 1; j <= 10; j++) { cout << j << "Program" << endl; } return 0; } In the following program we starts our loop from 1 and ends at 10 . We gives the ending condition as less than and equals to 10 so that the loop will starts from 1 and ends at 10 And also we uses the variable j in the display syntax so that the numbers will display in the output according to the loop. #include < iostream > using namespace std; int main() { for(int j = 0; j < 10; j++) { cout << j+1 << "Program" << endl; } return 0; } In the following program we starts our loop from 0 and ends at 10 means that the program will run 10 times. and in the display syntax we uses j+1 means that in the loop , first j=0 and according to the codition 1 will be adde...

Program to display output five times: #include < iostream > using namespace std; int main () { for(int a = 0; a < 5; a++) { cout << "Program"; } return 0; } To display in a sequence: #include < iostream > using namespace std; int main () { for(int a = 0; a < 5; a++) { cout << "Program" << endl; } return 0; } with the use of endl the output will show in a line. To display in a single line with space: #include < iostream > using namespace std; int main () { for(int a = 0; a < 5; a++) { cout << "Program" << " "; } return 0; } Add space in the inverted commas in the display syntax.

Repeatative Structures: Loops are uses to repeat values. The two types of loops are as follow: i. for Loop ii. while Loop * for Loop: It has three points i.e.; i. Starting point ii. Ending point iii. Counter Syntax: for(starting point; ending point; counter) { (statement) } for(int i=0; i { (statement) } in the above syntax we first declares an integer type variable and gives that the starting point i.e.; 0 and then gives that the ending point i.e.; less than 5 This means that the loop will start from 0 and stops after five turns. At the last there are double + with that variable use for next turn. This is called the counter .

To add commas around a word: Program: #include < iostream > using namespace std; int main(); { cout << " ' " << "Program" << " ' " << endl; return 0; }

Sum of variables when user gives input: Program: #include < iostream > using namespace std; int main() { int a , b; cin >> a; cin >> b; cout << "sum = " << a + b << endl; return 0; } Or #include < iostream > using namespace std; int main() { int a , b; cin >> a >> b; cout << "sum = " << a + b << endl; return 0; }

To Get Input From The User: Syntax: The syntax used to get input from the user is cin>> . Program: #include < iostream > using namespace std; int main() { int a; cin >> a; cout << "The value = " << a << endl; return 0; }

subtraction.learnprogramming.com Subtraction of two variables: #include < iostream > using namespace std; int main() { int a ; int b ; int result = 0 ; a = 4 ; b = 3 ; result = a - b ; cout << result << endl ; return 0; }

division.learnprogramming.com Division of two variables: #include < iostream > using namespace std; int main() { int a ; int b ; int result = 1 ; a = 2 ; b = 3 ; result = a / b ; cout << result << endl ; return 0; }

product.learnprogramming.com Product of two variables: #include < iostream > using namespace std; int main() { int a ; int b ; int product = 1 ; a = 2 ; b = 3 ; product = a * b ; cout << product << endl ; return 0; }

< sum.fashionandcs.com To find sum of two variables: #include < iostream > using namespace std; int main() { int a ; int b ; int sum = 0 ; a = 2 ; b = 3 ; sum = a + b ; cout << sum << endl ; return 0; } In the following program we declares two variables a and b and give there values as 2 and 3 respectively. We also declare a variable 'sum' that is equals to 0 to avoid the garbage value And then we add both variables that is equals to sum . Now the compiler will give 5 as output. First the values of both a and b i.e.; 2 and 3 will add and then it will stores in the variable sum . And as we our displaying sum so whatever the value is store will be dislay as output Garbage Value: Whenever we declare a variable a garble value is already stored in it. And when we assigns our own value to that variable it will replace. The garbage value will then destroy.

integerdeclaration.fashionandcs.com Integer type Variable: To store an integer type value we first declare a variable by using int and then stores an integer value in that variable. Actually int means integer type variable For example if we want to store 2 to a variable we will write the following program. #include < iostream > using namespace std; int main() { int a; a=2; return 0; } To display integer value stores in variable: And if you want to display this on compiler , write the following program #include < iostream > using namespace std; int main() { int a; a=2; cout << a << endl; return 0; } In this program the compiler will show 2 because we stored this on variable a Also We never uses " around a this is the reason that it will show 2 as output. If we use inverted commas " around a the compiler will show a as output.

variablesdeclaration.fashionandcs.com Datatype: Datatype is actually something that tells the type of the data. Types of datatype: To declare a variable we uses int, char, double, long, float, string etc. We will discuss them briefly one by one.

http://skipline.fashionandcs.com To Skip A Line: Syntax: To skip a line in C++ Programming, the syntax used is endl #include < iostream > using namespace std; int main() { cout << "Programming" << endl; return 0; }

http://codingc++.fashionandcs.com Program to display the output : Syntax: The syntax used to display the output within the C++ Program is cout must use angle brackets << and the semi colon ; with the sysntax if we want to display the word same as written, we uses " like: we want to display the word program we will write as: cout<<"program"; You can see the folowing program #include < iostream > using namespace std; int main() { cout << "Programming"; return 0; }

http://programming.fashionandcs.com Basic structure of C++ program The four basic terms uses for C++ program are as follow: #include < iostream > using namespace std; int main() return 0; In the program it will be written as: #include < iostream > using namespace std; int main() { (statement) return 0; }

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Computer Programming " Computer Programming by Maksha Riaz " search: click here: Computer Programming by Maksha Riaz Computer Programming (programming) is a process that leads from an original formulation of a computing problem to executable computer programs . Programming involves activities such as analysis, developing understanding, generating algorithms , verification of requirements of algorithms included their correctness and resources consumption, and implementation of algorithms in a target programming language . Basic Terms : > Program: Set of instructions given to the computer to solve the specific problem in the form of programming language. > Programming Languages: The language that a computer can understand. Types of Programming Language: There are two types of programming language . Low Level Programming Language High Level Programming Language Programming Langu...