String

[ncode]

I'm reading something about string and came across something that i'm blur. Please do help me.

char color[] = "blue"; //5-element array color containing 'b','l','u','e','\0'
const char *colorPtr = "blue"; //create pointer variable colorPtr that points to the string "blue' somewhere in memory


How is const char *colorPtr looks like in memory. I'm so blur about it. For char color[], I'm ok with it. Thanks

[CommonTater]

The char* will simply have the address of the first letter of the string literal, stored in a special section of your program's executable image.

In other words, it points to the string.

[ncode]

Thanks for that. I understand. Just asking......What is

int **blue;

Does this means dereference twice? And i remember my lecturer told me that there are something like type int*, int*** or else .....quite confusing. What is actually this?

[CommonTater]

int **blue is a pointer to the pointer named blue.

You would use this when you want to alter the pointer itself, not the values it points to.

for example...

*blue = malloc(some_number * sizeof(int));

assigns memory to blue to create an array.

[ncode]

Ok thanks