0000000000000000 b _ZStL8__ioinit U _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc U atexit 0000000000000000 T main 如上, 信息很多,但是对于现在这里,要关注的其实就是main函数入口而已,这个函数主要是检测一些.o、.a和.so库文件和目标文件,看是否把目标函数或者目标类编译进去了。比如下面这个简单...
cpp structMyStruct{//定义结构体intval1;charval2;MyStruct *p;//定义结构体指针};constMyStruct a;//定义结构体常量MyStruct b, arr[n];//定义结构体变量、结构体数组MyStruct *c;//定义结构体指针 访问成员 访问成员的几种方式: 结构体变量名.成员名 结构体指针名->成员名 (*结构体指针名).成员名 ...
string(COMPARE LESS <string1> <string2> ) string(COMPARE GREATER <string1> <string2> ) string(COMPARE EQUAL <string1> <string2> ) string(COMPARE NOTEQUAL <string1> <string2> ) string(COMPARE LESS_EQUAL <string1> <string2> ) string(COMPARE GREATER_EQUAL <string1> <string2> ) 列表操...
#include "string_array.h" #include<bits/stdc++.h> using namespace std; // 实现myStr myStr::myStr()//无参构造 { } myStr::myStr(const char* ch)//有参构造 { for (int i = 0; ch[i] != '\0'; i++) { length++; } data = new char[length + 1]; fo...
char array[3] = {'b', 'a', 'r'}; std::string_view array_v(array, sizeof array); std::string str{ " trim me" }; std::string_view v{ str }; v.remove_prefix(std::min(v.find_first_not_of(" "), v.size())); str; // == " trim me" v; // == "trim me" std:...
在多数的编码标准中,Template俨然和多重继承一样,成为了一般程序员(非程序库撰写者)的禁区。甚至运用模板较多的Boost,也成为了“众矢之的”。 但是实际上C++模板远没有想象的那么复杂。我们只需要换一个视角:在C++03的时候,模板本身就可以独立成为一门“语言”。它有“值”,有“函数”,有“表达式”和“语句”...
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>usingmap=std::map<Key, T, Compare, std::pmr::polymorphic_allocator<std::pair<constKey, T>>>; } (2)(since C++17) std::mapis a sorted associative container that contains key-value pairs with unique keys. Keys are sorted by using the comparison functionCompare. Search, removal, and in...
typedef array<int, 3> ARR; typedef vector<int> VI; typedef vector<double> VDB; typedef vector<string> VS; typedef vector<PII> VPII; typedef vector<ARR> VARR; typedef vector<VI> VVI; typedef vector<VDB> VVDB; typedef vector<VPII> VVPII; typedef unordered_map<int,int> ...
Note also that pmem::obj::vector does define convenient constructors and compare operators that take std::vector as an argument. Summary This chapter describes the libpmemobj-cpp library. It makes creating applications less error prone, and its similarity to standard C++ API makes it easier to...