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How to use the typedef struct in C
Educative Answers TeamThe C language contains the typedef keyword to allow users to provide alternative names for the primitive (e.g., int) and user-defined (e.g struct) data types.
Remember, this keyword adds a new name for some existing data type but does not create a new type.
Syntax
Using typedef struct results in a cleaner, more readable code, and saves the programmer keystrokes. However, it also leads to a more cluttered global namespace which can be problematic for large programs.
Examples
The following code snippets illustrate how to use the typedef struct.
1. Variable declaration without using typedef:
#include<stdio.h>
struct Point{
int x;
int y;
};
int main() {
struct Point p1;
p1.x = 1;
p1.y = 3;
printf("%d \n", p1.x);
printf("%d \n", p1.y);
return 0;
}2. Using the typedef keyword:
Note that there is no longer a need to type struct again and again with every declaration of the variable of this type.
Method one:
#include<stdio.h>
struct Point{
int x;
int y;
};
typedef struct Point Point;
int main() {
Point p1;
p1.x = 1;
p1.y = 3;
printf("%d \n", p1.x);
printf("%d \n", p1.y);
return 0;
}Method two:
#include<stdio.h>
typedef struct Point{
int x;
int y;
} Point;
int main() {
Point p1;
p1.x = 1;
p1.y = 3;
printf("%d \n", p1.x);
printf("%d \n", p1.y);
return 0;
}RELATED TAGS
c
struct
keyword
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