Write A C++ Program To Allocate Memory And Reallocate.

#include <stdlib.h> 
 #include <iostream.h> 
 #include <string.h> 
 #include<conio.h> 
 void main() 
 { 
                  clrscr(); 
                  char *p;             
              p = (char*)malloc(17); 
         if(!p) 
             { 
                     cout<<"Allocation Error\n";                                                
                     exit(1); 
              } 
                     strcpy(p, "This is 16 chars"); 
                     p = (char*)realloc(p, 18); 
         if(!p) 
             { 
                    cout<<"Allocation Error\n"; 
                    exit(1); 
             } 
                    strcat(p, "."); 
                    cout<<p; 
                    free(p); 
                    getch(); 
 } 
 Output: 
 This is 16 chars