String literals are const

String literals are const

According to the C++ standard, the following line is illegal:

 char *s = "hello world"; //illegal

Though still supported by many compilers, it’s deprecated and should be avoided. The reason is that the literal “hello world” is a constant. Storing it in a non-const array of characters is an error, since it may lead to the following bug:

 strcpy(s, "ab"); //OOPS! undefined behavior. attempt to modify a const object. 

The correct form is:

 const char *s = "hello world"; //now fine

And as a result, the compiler can detect the bug:

 strcpy(s, "abc"); //now a compile-time error: strcpy's first argument should be a non-const char*
Share the Post:
data observability

Data Observability Explained

Data is the lifeblood of any successful business, as it is the driving force behind critical decision-making, insight generation, and strategic development. However, due to its intricate nature, ensuring the

Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular