Three memory models of level 2 pointers

Three memory models of level 2 pointers

/* Level tow point have three cache model */# include
 
  
# Include
  
   
Int Print (char ** pArr); int Print02 (char ** pArr, int num); int GetMem (char *** thirdModel, int len ); int Destory (char *** thirdModel, int len); int main () {int I = 0; char ** thirdModel = NULL; // first cache modelchar * firstModel [10] = {"abc", "linux", "unix", 0 }; // second cache modelchar secondModel [3] [10] = {"abc", "linux", "unix"}; // third cache modelGetMem (& thirdModel, 4 ); strcpy (* (thirdModel + 0), "abc"); strcpy (* (thirdModel + 1), "l Inux "); strcpy (* (thirdModel + 2)," unix "); printf (" firstModel start \ n "); Print (firstModel ); printf ("secondModel start \ n"); Print02 (secondModel, 4); printf ("thirdModel start \ n"); Print (thirdModel); Destory (& thirdModel, 4 ); return 0;} int Print (char ** pArr) {int ret = 0, I = 0; if (NULL = pArr) {ret =-1; printf ("arg is null error: % d \ n", ret); return ret;} while (* pArr) {printf ("% s \ n", * pArr ); ++ pArr;} return ret;} int Print02 (char ** pA Rr, int num) {int ret = 0, I = 0; // The second-level pointer is different from the pointer to the array. Char (* arr) [10] = pArr; if (NULL = pArr) {ret =-1; printf ("arg is null error: % d \ n ", ret); return ret;} for (I = 0; I