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  1. #include <iostream>
  2. #include <memory.h>
  3. using namespace std;
  4.  
  5. void modify(void*& __ptr)
  6.  {
  7.     char* temp = new char[50];
  8.     strcpy(temp,"testing");
  9.     __ptr=(void*)temp;
  10.     std::cout<<"__ptr="<<(char*)__ptr<<endl;
  11.  }
  12.  
  13.  int main()
  14.  {
  15.     char* str;
  16.     modify(str);
  17.     std::cout<<"str="<<str;
  18.     return 0;
  19.  }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:16:15: error: invalid initialization of reference of type ‘void*&’ from expression of type ‘char*’
     modify(str);
               ^
prog.cpp:5:6: error: in passing argument 1 of ‘void modify(void*&)’
 void modify(void*& __ptr)
      ^
stdout
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Standard output is empty
https://ideone.com/yrOcHS
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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