function pointer of C

This skill, when observing the system call, is very much needed.

But I am not very familiar with, in addition, the function pointer array, it is even stronger ~ ~

A sample was made by HEAD first C:

Cat find.c #include<stdio.h>#include<string.h>intNum_ads =7;Char*ads[] = {  "WILLIAM:SBM Gsoh like sports, TV, dining",  "matt:swm NS likes art, movie, theater",  "Peter:shn like out, art",  "Dwm:ds likes truncks, sports and Bieber",  "luis:slm ND likes books, theater, art",  "JOSH:SJM likes sports, movies and theater",  "mike:dwm DS likes trucks, sports and Bieber"  };voidFind_raw () {inti; Puts ("Raw Search Results:"); Puts ("=================");  for(i =0; i < num_ads; i++) {        if(Strstr (Ads[i),"Sports" )          &&!strstr (Ads[i],"Bieber") {printf ("%s\n", Ads[i]); }} puts ("================");}intSports_no_bieber (Char*s) {  returnSTRSTR (s),"Sports") &&!strstr (s),"Bieber");}intSports_or_workout (Char*s) {  returnSTRSTR (s),"Sports") || STRSTR (s),"Workout");}intTheater_or_dining (Char*R) {  returnSTRSTR (s),"Theater") || STRSTR (s),"Dining");}voidFindint(*match) (Char*) ){  inti; Puts ("Search Results:"); Puts ("*******************");  for(i =0; i < num_ads; i++) {    if((*match) (Ads[i])) {printf ("%s; \ n", Ads[i]); }    if(!match (Ads[i])) {printf ("$$$$$$$$$$$$$\n"); }} puts ("*************************");}intMain () {Find_raw ();  Find (Sports_or_workout); Find (&theater_or_dining); return 0;}

function pointer of C