How can type-insensitive macros be created? in C programming

How can type-insensitive macros be created?

A type-insensitive macro is a macro that performs the same basic operation on different data types. This task
can be accomplished by using the concatenation operator to create a call to a type-sensitive function based
on the parameter passed to the macro. The following program provides an example:

#include <stdio.h>
#define SORT(data_type) sort_ ## data_type
void sort_int(int** i);
void sort_long(long** l);
void sort_float(float** f);
void sort_string(char** s);
void main(void);
void main(void)
{
int** ip;
long** lp;
float** fp;
char** cp;
...
sort(int)(ip);
sort(long)(lp);
sort(float)(fp);
sort(char)(cp);
...
}

This program contains four functions to sort four different data types: int, long, float, and string (notice
that only the function prototypes are included for brevity). A macro named SORT was created to take the data type passed to the macro and combine it with the sort_ string to form a valid function call that is appropriate for the data type being sorted. Thus, the string

sort(int)(ip);
translates into
sort_int(ip);
after being run through the preprocessor.

Cross Reference:

V.1: What is a macro, and how do you use it?
V.16: What is the concatenation operator?