linux c函数指针的应用

头文件：1.h

#include<stdio.h>int nul_func();
int test1(int a,int b);
int test2(int a,int b,int c);
int test3(int a,int b,int c,int d);
int GetFunc(char *p,int (**pfunc)());struct test
{
    char *pName;
    int  (*pFunc)();
}fun[] = {     {"test1",test1},
    {"test2",test2},
    {"test3",test3},
    {"nul_func",nul_func}};

函数实现：15.c

#include "1.h"
#include <string.h>int GetFunc(char *p,int (**pfunc)())
{
    int i=;    while( memcmp(fun[i].pName,"nul_func",) != )
    {
        if( memcmp(p,fun[i].pName,strlen(fun[i].pName)) ==  )
        {
            *pfunc = fun[i].pFunc;
            return ;
        }
        i++;
    }       printf("%s\n","No Such Func.");
    return ;
}int test1(int a, int b)
{
    printf("a = %d, b = %d\n",a,b);
    return ;
}int test2(int a, int b, int c)
{
    printf("a = %d, b = %d , c = %d\n",a,b,c);
    return ;
}int test3(int a, int b,int c,int d)
{
    printf("a = %d, b = %d, c = %d, d = %d\n",a,b,c,d);
    return ;
}int nul_func()
{
    printf("%s\n","No Such Func");
    return ;
}

主函数：14.c

#include<stdio.h>int main()
{
    int i;
    int (*pFunc)();
    char caName[] = "";     memcpy(caName,"test1",);
    i = GetFunc(caName,&pFunc);
    printf("%s\n",caName);
    i = (*pFunc)(,);    memcpy(caName,"test2",);
    i = GetFunc(caName,&pFunc);
    printf("%s\n",caName);
    i = (*pFunc)(,,);    memcpy(caName,"test3",);
    i = GetFunc(caName,&pFunc);
    printf("%s\n",caName);
    i = (*pFunc)(,,,);    return ;
}

编译：gcc 14.c 15.c -o test

结果：./test