


How to Handle GCC's Deprecated Conversion Warnings from String Constant to `char*`?
Dec 05, 2024 am 11:20 AMHow to Work Around Warnings About Deprecated Conversion from String Constant to 'char*'
In GCC versions prior to 4.3, one could declare a variable with a char * type and then assign it a string literal. However, GCC 4.3 and later deprecate this practice with a warning. The correct way to do this is to declare the variable as const char *, but if you have a large codebase and do not want to fix all the instances at once, there is a way to stifle the warnings.
To suppress these warnings, change the type of any functions that you pass string literals to from char * to const char *. This is the correct way to do it anyway, so if you're going to fix something, fix it right.
The reason for this deprecation is that string literals are of type const char *, and casting away the const to modify them is undefined behavior. To modify a string, you need to copy the const char * string character by character into a dynamically allocated char * string.
Here is an example of how to do this correctly:
#include <iostream> void print(char* ch); void print(const char* ch) { std::cout << ch; } int main() { print("Hello"); return 0; }
The above is the detailed content of How to Handle GCC's Deprecated Conversion Warnings from String Constant to `char*`?. For more information, please follow other related articles on the PHP Chinese website!

Hot Article

Hot tools Tags

Hot Article

Hot Article Tags

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

What are the types of values returned by c language functions? What determines the return value?

C language function format letter case conversion steps

What are the definitions and calling rules of c language functions and what are the

Where is the return value of the c language function stored in memory?

How does the C Standard Template Library (STL) work?

How do I use algorithms from the STL (sort, find, transform, etc.) efficiently?
