C++ (Qt)int main(){ int a = 123'123; return 0;}
❯ clang -std=c17 untitled.cuntitled.c:3:14: warning: missing terminating ' character [-Winvalid-pp-token] int a = 123'123; ^untitled.c:3:14: error: expected ';' at end of declaration int a = 123'123; ^ ;1 warning and 1 error generated.
❯ clang++ -std=c++17 untitled.cclang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]