Producing uppercase letters without pointers

Question

I am trying to write a function, uppercase, that converts all lowercase characters in a string into their uppercase equivalents.

However, I am getting a Bus 10 error in

Answer 1

The reason you get a crash is that your code modifies a string literal. Characters inside string literals are placed in protected memory area, and therefore may not be changed: it us undefined behavior.

Replace this

uppercase("cold");

with this:

char cold[] = "cold";
uppercase(cold);

Now the characters of the string are placed in a modifiable area of memory, allowing you to make changes as needed.