A C program basically consists of following parts :
- Preprocessor Commands
- Comments
- Variables
- Statements & Expressions
- Functions
Steps to write and execute a c program : If you want to create, compile and execute C programs by your own, you have to install C compiler in your machine. Then, you can start to execute your own C programs in your machine.
- Create
- Compile
- Execute or Run
- Get the Output
Lets see how to write a simple program in c language :
#include<stdio.h>
int main()
{
/* our first simple c basic program */
printf("Hello World");
getch();
return 0;
}
Output :
Lets take a look at various parts of the above program :
- The first line o the program #include <stdio.h> is a preprocessor command, which tells a C compiler to include stdio.h file before going to actual compilation.
- The next line int main() is the main function where the program execution begins.
- The next line /*...*/ will be ignored by the compiler and it has been put to add additional comments in the program. So such lines are called comments in the program.
- The next line printf(...) is another function available in C which causes the message "Hello World" to be displayed on the screen.
- The next line return 0; terminates the main() function and returns the value 0.
