sizeof « char « C Data Type Q&A

1. Is it necessary to multiply by sizeof( char ) when manipulating memory?    stackoverflow.com

When using malloc and doing similar memory manipulation can I rely on sizeof( char ) being always 1? For example I need to allocate memory for N elements of type char. Is ...

2. How do you know how much space to allocate with malloc()?    stackoverflow.com

I'm a total C newbie, I come from C#. I've been learning about memory management and the malloc() function. I've also came across this code:

char *a_persons_name = malloc(sizeof(char) + 2);

3. Potential problem with C standard malloc'ing chars    stackoverflow.com

When answering a comment to another answer of mine here, I found what I think may be a hole in the C standard (c1x, I haven't checked the earlier ones ...

4. sizeof(""+0) != sizeof(char *) Bug or undefined behaviour?    stackoverflow.com

The following C program:

#include <stdio.h>

int main(void)
{
    printf("%u %u %u\n",sizeof "",sizeof(""+0),sizeof(char *));
    return 0;
}

5. Why write `sizeof(char)` if char is 1 by standard?    stackoverflow.com

I was doing some C coding and after reading some C code I've noticed that there are code snippets like

char *foo = (char *)malloc(sizeof(char) * someDynamicAmount);

6. sizeof(char*)    bytes.com