Compilation and Execution

• To convert the program into machine understandable language, compiler is used.
• Compiler vendors provide an (IDE) Integrated Development Environment which consists of an editor as well as compiler.
• Examples of compilers :
• Turbo C, Turbo C++ and microsoft C are compilers that work under MS DOS.
• Visual C++ and Borland C++ are the compilers that work under windows.
• gcc compiler works under linux.
• printf() outputs the values to the screen whereas scanf() receives them from the keyboard.

C Instructions:
There are basically three types of instructions in C:

• Type Declaration instruction
• Arithmetic Instruction
• Control Instruction

 Purpose of each instructions is given below:

1. Type Declaration Instruction : To declare the type of variables used in C program.
2. Arithmetic Instruction :  To perform arithmetic operations between constants and variables.
3. Control Instruction : To control the sequences of execution of various statements in C programs.

 Commands used in TC:

1. To create a new file.
1. Alt + (F) File -> New   
2.  To open an existing file.
1. Alt + (F) File -> Open
3.  To save a  file.
1. Alt + (F) File -> Save   
4.  To compile a  file. 
1. Ctrl + F9