3D printing helps to reduce the time it takes for a manufacturer to create the product. This lets manufacturers invest their time to make flawless products because the production cycle time is reduced.
Black or blue pen would be appropriate.
In C, you deal with a string always via a pointer. The pointer by itself will not allocate memory for you, so you'll have to take care of that.
When you write char* s = "Hello world"; s will point to a "Hello world" buffer compiled into your code, called a string literal.
If you want to make a copy of that string, you'll have to provide a buffer, either through a char array or a malloc'ed bit of memory:
char myCopy[100];
strcpy(myCopy, s);
or
char *myCopy;
myCopy = (char*)malloc( strlen(s) + 1 );
strcpy(myCopy, s);
The malloc'ed memory will have to be returned to the runtime at some point, otherwise you have a memory leak. The char array will live on the stack, and will be automatically discarded.
Not sure what else to write here to help you...
