deprecated conversion from string constant to ‘char*’

How to get rid of compiler error-

deprecated conversion from string constant to ‘char*’

I got this compilation error while compiling the below code.

void ABC(char *strng) {};
ABC("Hello World");
or
void ABC(char *strng){};               //This code may compile but the window will crash on execution
char *strng1="Hellow World";
ABC(strng1);

I find two solution for this...
1.
void ABC(char *strng){};
char strng1[] ="Hellow World";
ABC(strng1);

2. define const every where if the sting does no changes.
void ABC(const char *strng){};
const char *strng1 ="Hellow World";
ABC(strng1);

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Memory Padding

Memory Padding

Lets understand Memory padding by an example.

#include <iostream>

using std::cout;

struct checkSize

{

    int a;

    char b;

    short int c;

    int d;

    char e;

};

int main()

{

  cout <<"Size of structure::"<<sizeof(checkSize);

  return 0;

}

Given Condition:: System is 32 bit. Size of int = 4 bytes, char = 1 byte and short int = 2 bytes.

As we expect the output of this as 12 bytes. But the actual answer is 16 bytes.

Reason:; Memory Padding is used in this.

In a 32 bit system, the bus have limit carry only 32 bits or 4 bytes of data in one time. Or in other word we can say system bus carry data in a group of 4 bytes. Through memory padding technique system tries to group the data in size of 4 bytes in this case also.

int a; 4 byte           -- group 1

char b; 1 byte        -- group 2

short int c; 2 byte  -- group 2

int d; 4 byte           -- group 3

char e;  1 byte       -- group 4

The memory is grouped in the sequence of initialization of the variable.

Group 1 and 3 will contain 4 bytes while group 2 contains 3 bytes and group 4 contains only 1 byte.

If we would have initialized like below, if would have took only 12 bytes of memory.

struct checkSize

{

    char e;

    char b;

    short int c;

    int d;

    int a;

};

Memory padding technique is not used in Class in C++.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.