의이 코드를 보자 :C 함수 이름 또는 함수 포인터?
#include <stdio.h>
typedef int (*callback) (void *arg);
callback world = NULL;
int f(void *_) {
printf("World!");
return 0;
}
int main() {
printf("Hello, ");
// world = f;
world = &f; // both works
if (world != NULL) {
world(NULL);
}
}
world
변수를 설정, 모두 world = f;
및 world = &f;
작품.
어떤 것을 사용해야합니까? 그것은 컴파일러 또는 C 버전에 의존합니까?
% gcc -v
Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 8.0.0 (clang-800.0.38)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
http://stackoverflow.com/questions/6293403/in-c-what-is-the-difference-between-function-and-function-when-passed-as-a – Pavel
에 http : // 유래 .com/questions/3674200/what-does-a-typedef-with-parenthesis-like-typedef-int-fvoid-mean-is-it-a –