TypeDef in C




TypeDef in C

  • The C programming language provides a keyword called typedef, by using this keyword you can create a user defined name for existing data type.
  • Generally typedef are use to create an alias name (nickname).

Declaration of typedef

 typedef datatype alias_name; 

Example:

typedef int intdata;
typedef

Sample Code

#include<stdio.h>
#include<conio.h>
typedef int intdata; 
void main()
{
          int a=10;
          typedef intdata integerdata;
          integerdata b=20;
          integerdata s; 
          s=a+b; 
          printf("\nSum::%d",s);
          getch();
}

Read Also

TypeDef in linux

Code Explanation

  • In above program Intdata is an user defined name or alias name for an integer datatype.
  • All properties of the integer will be applied on Intdata also.
  • Integerdata is an alias name to existing user defined name called Intdata.

Output

Sum::30

Advantages of typedef:

  • It makes the program more portable.
  • typedef make complex declaration easier to understand.
typedef

TypeDef With Struct

  • We have to include keyword struct every time you declare a new variable, but if we use typedef then the declaration will as easy as below.
typedef

Syntax

typedef struct{
	int id;
	char *name;
	float percentage;
}student;
student a,b;


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