我代码是这样的:

#include

using namespace std;

int result(int, int);

const int k =2;

struct Point{

int x , y;

};

int main() {

int z(0), b(50);

Point a;

cout<< "输入两个整数(以空格区分):";

cin>> a.x >> a.y;

z = (a.x + a.y) * k;

z = result(z, b);

cout<< "计算结果如下:" << endl;

cout<< "((" << a.x << " + " << a.y

<< " ) * " << k<< ")+" << b

<< "=" << z

<< endl;

return 0;

}

但是报错了:

Scanning dependencies of target cpp

[ 50%] Building CXX object CMakeFiles/cpp.dir/main.cpp.o

[100%] Linking CXX executable cpp

Undefined symbols for architecture x86_64:

"result(int, int)", referenced from:

_main in main.cpp.o

ld: symbol(s) not found for architecture x86_64

collect2: error: ld returned 1 exit status

make[3]: *** [cpp] Error 1

make[2]: *** [CMakeFiles/cpp.dir/all] Error 2

make[1]: *** [CMakeFiles/cpp.dir/rule] Error 2

make: *** [cpp] Error 2

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学习c++的新手遇到问题,求大神帮个忙