Oc-03-oc access to the OC source file, C source file functions

Show.h

#ifndef __ocday01__show__#define __ocday01__show__#include <stdio.h>extern void Testtshow (); #endif/* Defined (_ _OCDAY01__SHOW__) */

Show.c

#include "Show.h" void Testtshow () {    printf ("I am a function in the famous C file, who dares to invoke?  "). haha  \ n ");}

MAIN.M (OC source file)

  6-"Understanding" access to OC source files, functions in C source files #import <foundation/foundation.h>//Introduce the header file of Show #import "Show.h" void  test1 () {    printf ("Hello I am the  C language function  I put in the  OC original file, do you dare to call me all at once  ?  " Ha ha  \ n ");} int main (int argc, const char * argv[]) {    @autoreleasepool {        //oc)   is feasible to access the C language function written in the OC source file.         Test1 ();  It is possible to access the C function written in the C file in OC.        Testtshow ();    }    return 0;}

Oc-03-oc access to the OC source file, C source file functions