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extern "C"

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Í·ÎļþcExample.h
#include <stdio.h>
#ifndef C_EXAMPLE_H
#define C_EXAMPLE_H
int add(int x,int y);
#endif

º¯ÊýʵÏÖÎļþcExample.c(×¢ÒâÊÇ.cÎļþ)
#include<stdio.h>
#include "cExample.h"
int add(int x,int y)
{
return x+y;
}

mainÎļþcppFile.cpp
#include<iostream>
using namespace std;
extern "C" //ÓÉÓÚµ÷ÓõÄÊÇCÍ·Îļþ£¬¹ÊÒª¼Óextern "C"
{
#include "cExample.h"
}
void main()
{
cout<<add(2,3)<<endl;
}

========================================================
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mainÎļþcppFile.cpp
#include<iostream>
using namespace std;
#include "cExample.h"
void main()
{
cout<<add(2,3)<<endl;
}

=========================================================
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main.c
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#include "resource.h"
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void InitQueue(LiQueue *q)
{
  q=(LiQueue*)malloc(sizeof(LiQueue));
    q->front=q->rear=NULL;
}
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int QueueEmpty(LiQueue *q)
{
 if(q->rear==NULL)
 {
  return 1;
 }
 else
 {
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