G++和C++选项下的代码是没有差异的,但在库上面,两者有一定差距,比如G++默认可以cin一个string变量,而选择C++时则需要#include,如果用C++编写代码,提交时最好选择G++作为编译器. 这样的一段c++代码用gCC是会编译错误的。 #include <iostream> #include<cstdio> #include<cmath> using namespace
AI代码解释 #include<ctime>#include<vector>#include<algorithm>#include<cstdio>#include<stdint.h>#include<cstddef>#include<string>classfoo_a{public:virtual~foo_a(){}virtualvoidinfo(){printf("%s:%d\n",__FUNCTION__,__LINE__);}voidprint(){printf("%s:%d\n",__FUNCTION__,__LINE__);}};...
#include <cstdio> int main() { printf("%ld\n", __cplusplus); } ➜ test g++ test_cpp_version.cpp -o test_cpp_version ➜ test ./test_cpp_version 201402 ❓__cplusplus宏的作用: 在代码中区分当前的编译环境是 C 还是 C++。(通常在C++代码中嵌入C代码时使用) 查看当前C++版本。 指定...
[const] char*, crope, wrope, [signed|unsigned] char, [unsigned] short, [unsigned] int, [unsigned] long 1. 如果需要的话,我们也可以为其他类型实现模板特化 1 // hash_map<Key, Tp, HashFn=hash<Key>, EqualKey=equal_to<Key>, Alloc=allocator<Tp> > 2 #include <cstdio> 3 #include <u...
#include <cstdio>classX {};classY :publicvirtualX {};classZ :publicvirtualX {};classA :publicY,publicZ {};intmain(intargc,char**argv) { printf("Ptr: %lu\n",sizeof(void*)); printf("X: %lu\n",sizeof(X)); printf("Y: %lu\n",sizeof(Y)); ...
If not, see // <http://www.gnu.org/licenses/>./** @file tr1/stdio.h This is a TR1 C++ Library header./ ifndef _TR1_STDIO_H define _TR1_STDIO_H 1 include <tr1/cstdio> endif 从源代码上看stdio.h只包含了cstdio，可以用#include <cstdio>替换 #include <stdio.h> include...
E:/MABS/msys64/mingw32/include/c++/10.1.0/cstdio:175:11: error: 'snprintf' has not been declared in '::' 175 | using ::snprintf; | ^~~~ E:/MABS/msys64/mingw32/include/c++/10.1.0/cstdio:185:22: error: 'snprintf' has not been declared in '__gnu_cxx' 185 |...
#include <string> #include <new> #include <cstdio> #include <cstdlib> std::size_t allocated = 0; void* operator new (size_t sz) { void* p = std::malloc(sz); allocated += sz; return p; } void operator delete(void* p) noexcept { return std::free(p); } int main() { allo...
#ifdef__cplusplus# include<cstdio>#else# include<stdio.h>#endifintmain() {/* Always check Clang before __GNUC__ because it defines that too */#ifdef__clang__printf("clang | %s\n",__clang_version__);return0;#endif#ifdef__GNUC_VERSION__/* Could be TCC or another compiler profess...
a.cpp:#include"a.hpp"#include<cstdio>classAImpl:publicA{voidfoo()override{std::puts("foo!")...