https://bladesu.github.io/categories/c-language/ Recent content in c language on Blade Su The Coder Hugo -- gohugo.io en Tue, 03 Mar 2020 22:22:27 +0800 https://bladesu.github.io/posts/2020/03/03/standard_is_most_important_in_c/ Tue, 03 Mar 2020 22:22:27 +0800 https://bladesu.github.io/posts/2020/03/03/standard_is_most_important_in_c/ Recently, I start to code a lot in c language. One of my studying material is “Head First C” written by David Griffith. And I am so confused about an example it talking about XOR encrption. void encrpt(char *mes) { while (*mes) { *mes = *mes ^ 31; mes++; } } } This code could be compiled without any error or warning (Apple LLVM version 9.1.0 (clang-902.0.39.1)). But I am really curious about how XOR operator worker on the two operand *mes and the integer literal 31.