C 回调函数
Angie An
  2023-12-15 11:21:29 2023-12-15 11:21  

C callback function

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graph LR
id1(main program) --- id3(callback func)
id1(main program) -->|calls| id2(Lib Func)
id2(Lib Func) -->|calls| id3(callback func)
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#include<stdio.h>
#include<Lib.h> // include Library function

int Callback() // Callback Function
{
  // TODO
  return 0;
}
int main() // Main program
{
  // TODO
  Library(Callback);
  // TODO
  return 0;
}

code: 

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#include<stdio.h>

int Callback_1(int x) // Callback Function 1
{
    printf("Hello, this is Callback_1: x = %d ", x);
    return 0;
}

int Callback_2(int x) // Callback Function 2
{
    printf("Hello, this is Callback_2: x = %d ", x);
    return 0;
}

int Callback_3(int x) // Callback Function 3
{
    printf("Hello, this is Callback_3: x = %d ", x);
    return 0;
}

int Handle(int y, int (*Callback)(int))
{
    printf("Entering Handle Function. ");
    Callback(y);
    printf("Leaving Handle Function. ");
}

int main()
{
    int a = 2;
    int b = 4;
    int c = 6;
    printf("Entering Main Function. ");
    Handle(a, Callback_1);
    Handle(b, Callback_2);
    Handle(c, Callback_3);
    printf("Leaving Main Function. ");
    return 0;
}
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