Tuesday, 14 August 2012
Input-Output Functions in C
Input-Output Functions in C
The Two Types of C Functions
1) Predefined / Built-in/ Library Functions
These are defined in Header Files (.h)
1.1) Mathematical : sqrt() , abs(), floor(), ceil(), sin(), cos(), tan()
1.2) Numeric Input : scanf()
1.3) Numeric Output : printf()
1.4) char Input : getc(), getchar(), getch(), getche() & scanf()
1.5) char output : putc(), putchar(), printf()
1.6) String Input : gets(), scanf()
1.7) String output : puts(), printf()
1.8) String manipulation : strlen(), strupr, strlwr(), strcpy(), strcat(), strcmp().....
1.9) Screen clearing : clrscr()
1.10) String Conversion : atoi(), atol() , atof() - <stdlib.h>
etc.........
2) User-defined Functions
2.1) main() : Mandatory Function - Automatically called by Compiler
2.2) sub-functions : optional
- declaration
- definition
- calling / invoking
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