How to build your own library of functions

Methods and applications of custom function libraries:

One, 2 related commands 1, TCC--TC DOS command line compiler connection Tool 2, TLIB--TC DOS Library operation tool

Two, a custom function library example

1, in the TC Integration Environment, the compilation of a file useradd.c

#define _NO_MAIN
int add(int *a,int *b)
{ int c;
c=(*a)+(*b);
return c;
}

Build a Useradd by ALT-F9 compilation. Obj file.

2, press F10-f-o to retreat to Dosshell (DOS environment)

COPY Useradd. OBJ to.. \lib directory, executing in \lib directory

Tlib Userlib. Lib+useradd. OBJ generates a library of its own userlib, which contains the binary code of the function module int add (int *a,int *b). Now that the custom function has been put into the function library, you can delete the original file USERADD.C. (Of course, in order to maintain convenience later, or make a backup as well). Later, if you have other function modules, you can also compile the tlib command to join the library.

3, write a file containing USER1. H, copy to the Include directory when you finish writing. The contents are as follows:

int add (int *,int *);

4, made the above custom function library preparation work, now can use.

Write a program named ADD-1.C, call the library function add () in the program;

#include<stdio.h>
#include<user1.h>
void main( )
{
int a,b,c;
a=20;b=30;
c=add(&a,&b);
printf(“%d”,c);
}

5, in the DOS command line, the implementation of TCC ADD-1. C.. \lib\userlib. LIB is ok!

Run Add-1.exe, you can see output 50

=============================================================

Note: Compiling and connecting in DOS is a hassle, and the following methods can be compiled and connected in a TC integrated environment.

In the second step above, the execution of the Tlib command is changed to Tlib CS. Lib+useradd. OBJ This is to add the binary code of the custom function module to the Run-time Library CS. Lib inside. (corresponding to the different compilation mode, choose different Cx.LIB)

Then compile the connection ADD-1 in the integrated environment. C is OK.

Note: CS.LIB Small mode Library

Cc. LIB Compact Mode Library

Cm. LIB Medium Pattern Library

Cl. LIB Large Mode Library

Ch. LIB Macro Mode Library

(The above five are run-time libraries that connect these libraries regardless of which program is established)

emu| Fp87:emu is a floating-point simulation function library, while FP87 is a floating point function library that is used when we have the 80x87 processor. If you have floating-point operations in your program, you must connect one of these two function libraries, and the MATHX function library.

MATHX: A library of mathematical functions. where x represents S, C, M, L, h characters.

In addition, the binary of which library function of TC is placed in which function library is unknown. But one thing is for sure, right here in the library.