C++调用C（linux下）

C的头文件：1.h

  1 #pragma once
  2 
  3 #ifdef __cplusplus
  4 extern "C"
  5 {
  6 #endif
  7     int fun();
  8 
  9 #ifdef __cplusplus
 10 }
 11 #endif
 12 
 13 
 14 int fun();
 15 

1.c:

 1 #include"1.h"
  2 #include<stdio.h>
  3 
  4 int fun()
  5 {
  6     printf("this is C Program\n");
  7     return 0;
  8 }

1.cpp中调用C文件的fun():

  1 #include<iostream>
  2 using namespace std;
  3 
  4 extern "C"
  5 {
  6     #include"1.h"
  7 }
  8 
  9 
 10 int main()
 11 {
 12     cout<< "this is C++ program\n";
 13     fun();
 14 
 15     return 0;
 16 }

编译运行：

yisheng@yisheng-v-m:~/lianxi$ g++ 1.cpp 1.c
yisheng@yisheng-v-m:~/lianxi$ ./a.out 
this is C++ program
this is C Program
yisheng@yisheng-v-m:~/lianxi$