将类转换为结构 [英] Converting class to struct

问题描述

我有一个任务，我必须将类似 c++ 的程序转换为 c 程序.

I have an assignment where I have to convert a c++ like program to a c program.

如果我有类似的东西

class B {
    int var;
    int somefunction(){
        some code here
    }
}

它会变成

struct B{
    int var;
}

int somefunction(){
    some code here
}

基本上，我每次看到它时都必须将 class 更改为 struct，如果有函数，我现在必须将其移出结构体.

Basically, I have to change class to struct every time I see it, and if there is a function I have to move it out outside the struct now.

做这样的事情的最佳方法是什么?我明白这背后的理论，但不知道如何去接近它.

What is the best approach to doing something like this? I get the theory behind this but not sure how to go about approaching it.

推荐答案

通常，您将指向结构的指针传递给函数.例如，如果您有以下 C++ 代码:

Typically you pass a pointer to the struct to the function. For example, if you had this C++ code:

class A {
    private:
       int x;
    public:
       A() : x(0) {
       }
       void incx() {
          x++;
       }
};

等效的 C 代码是:

struct A {
    int x;
};

void init( struct A * a ) {   // replaces constructor
    a->x = 0;
}

void incx( struct A * a ) {
    a->x++;
}

然后这样称呼它:

struct A a;
init( & a );
incx( & a );

但我不得不问你为什么认为需要将 C++ 代码转换为 C?

But I have to ask why you think you need to convert C++ code to C?

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