C Two-level pointer memory model three

Tag:c    memory model     level two pointer    

#include  <stdio.h> #include  <stdlib.h> #include  <string.h>/* third memory model for level two pointers */// Print string array Int printarray (char **arraystr,int num) {    int i = 0 ;    for  (i=0; i<num; i++)     {         printf ("%s \n", Arraystr[i]);    }     return 0;} Sort Int sortarraystr (char **arraystr,int num) {    int i = 0,  j = 0;    char *temp = null;    for   (i=0; i<num; i++)     {         for (j=i+1; j<num; j++)         {             if (strcmp (arraystr[i],arraystr[j])  < 0)              {                 temp = arrayStr[i];                 arrayStr[i] = arrayStr[j];                 arraystr[j] =  temp;            }         }    }    return 0;} Second-level pointer to the third memory model Int main () {    int i = 0, j = 0;     char buf[100];    char **arrayStr =  (char **) malloc (10*sizeof (char *)); //int array[10]    if  (arrayStr ==  null)     {        return;    }    for  (i=0; i <10; i++)     {        arraystr[i] =   (char *)  malloc (100*sizeof (char)); // char buff[100]         if  (arraystr[i] == null)          {            printf ("ddde\n");             return;         }        sprintf (Arraystr[i], "%d%d%d", I,i,i);     }    printf ("before ordering \ n");     printarray (arraystr,10);     sortarraystr (arraystr,10);     printf ("after ordering \ n");     PrintArray (arraystr,10);    for (i=0; i<10; i++)     {         free (Arraystr[i]);     }    if (ArrayStr != NULL)     {        free (ARRAYSTR);     }    system ("pause");     return 0;}

C Two-level pointer memory model three