c++ - Get part of a char array

Question

I feel like this is a really silly question, but I can't seem to find an answer anywhere!

Is it possible to get a group of chars from a char array? to throw down some pseudo-code:

char arry[20] = "hello world!";
char part[10] = arry[0-4];
printf(part);

output:

hello

So, can I get a segment of chars from an array like this without looping and getting them char-by-char or converting to strings so I can use substr()?

Answer 1

You could use memcpy (or strncpy) to get a substring:

memcpy(part, arry + 5 /* Offset */, 3 /* Length */);
part[3] = 0; /* Add terminator */

On another aspect of your code, note that doing printf(str) can lead to format string vulnerabilities if str contains untrusted input.