C + + Basics-Function pointer array

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I've always felt that the function pointer and the function pointer array Nothing, until later I knew these things

Correct usage, that is to let! You! See! No! Understand!

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Here is my sample small code.

The first version of the typedef.

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function pointers

(Use function pointers as type definitions and initialize arrays)

#include <iostream>using namespace Std;int MyFunc1 (int p,int q) {return p%q;} int MyFunc2 (int p,int q) {return p/q;} int MyFunc3 (int p,int q) {return p-q;} typedef int (*PMF) (int,int); int main () {    PMF arrpmf[3]={myfunc1,myfunc2,myfunc3};    int nres;    NRES=ARRPMF[1] (7,2);    cout<<nres<<endl;    NRES=1[ARRPMF] (7,2);    cout<<nres<<endl;    return 0;}

　　

Array of function pointers

#include <iostream>using  namespace std;int MyFunc1 (int p,int q) {return p%q;} int MyFunc2 (int p,int q) {return p/q;} int MyFunc3 (int p,int q) {return p-q;} typedef int (*pmf[]) (int,int); int main () {    PMF arrpmf={myfunc1,myfunc2,myfunc3};    int nres;    NRES=ARRPMF[1] (7,2);            cout<<nres<<endl;    NRES=1[ARRPMF] (7,2);            cout<<nres<<endl;    return 0;}

From know C + + this thing to now barely able to write two lines of code, although over the years I have seen some very fantasy works, but suddenly saw

1[ARRPMF] (7,2);

I've been doing it for a while. Kill anyone is a must for home travel.

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If you do not have a good c/C + + foundation and the basic comprehend by analogy and widely associative small head melon seeds, you can basically "give up the speed of death."

(The line below is not code)

arrpmf[1]==>* (arrpmf+1) <==>* (1+ARRPMF) ==>1[ARRPMF]

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The most anticipated technique (Zuò) (sǐ) edition

Enjoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooy it!

#include <iostream>using  namespace std;int MyFunc1 (int p,int q) {return p%q;} int MyFunc2 (int p,int q) {return p/q;} int MyFunc3 (int p,int q) {return p-q;} Int (*arrpmf[]) (int,int) ={myfunc1,myfunc2,myfunc3};//when the line is 108,000 from the point of call, La La. int main () {    int nres;    NRES=1[ARRPMF] (7,2);//Feel the deep malice of the arrogant universe    cout<<nres<<endl;    return 0;}

　　

C + + Basics-Function pointer array