Question

#include <iostream>

using namespace std;

int main()
{
     char buffer[8];
     int field=534;
     memcpy(buffer,&field,sizeof(field));
     cout<<buffer<<endl;

     return 0;
}

This returns an empty buffer. Why?

Basically looking for an alternative to sprintf to convert int to char buffer.

Itoa is not available.

Thoughts? Better alternatives?

Answer 1

You will have to use sprintf or itoa to convert a binary int to an ascii string.

The representation if ints and and char arrays is totally different and ints can conytain bytes with a value of zero but strings can only have that as the last byte.

for example

Takes 0 – in int it is represented by 4 bytes with values 0 whilst ) as a string has the first two bytes of 48 and 0 so no simple cast will chnage this