C函數和C++函數相互調用

C函數和C++函數相互調用

test.c

int call_MyMath_sum (int,int);
 
int sum(inta , intb) {
 return call_MyMath_sum(a,b);
}

main.cpp

#include <iostream>
 using namespace std;
 
extern"C" {
 int sum(int, int);
 }
 
class MyMath {
 public:
    static int sum(int, int);
 };
 intMyMath::sum(inta, intb) {
    return(a + b);
 }
 
extern"C" int call_MyMath_sum (inta , intb) {
    return(MyMath::sum(a,b));
 }
 
int main(void) {
    cout<<sum(5,6);
    return0;
 }

Makefile

main.o:
  g++ -c -o main.o main.cpp
test.o:
  gcc -c -o test.o test.c
main: main.o test.o
  g++ -o main main.o test.o
all: clean main
clean:
  rm -f test.o main.o