#include<iostream>#include<string>#include<cmath>usingnamespacestd;doubledivide(inta,intb){constdoubleeps=1e-9;doubleret=0;if(fabs(b)<eps){// 除数为0,发生错误throw0;}else{ret=a/b;}returnret;}voidmain(){try{doubleret=divide(1,0);cout<<"r="<<ret<<endl;}catch(...){cout<<"除...
有如下程序: #include<iostream> using namespace std; int main() { cout.fill('*'); cout.width(6); cout.fill('#'); cout<<888<<end1; return 0; } 的执行结果是( )。 A.###888B.888###C.***888D.888*** 相关知识点: 试题来源: 解析 A [解析] C++在流操作中,利用cout对...
2022年C语言过渡到C++的课程,瞬间精通双语言。 1.8万播放 1、用C++做题的好处_高清 1080P 01:28 2、using namespace std_高清 1080P 06:31 3、cin cout 头文件_高清 1080P 01:20 4、变量声明_高清 1080P 01:21 5、bool变量_高清 1080P 01:57 6、const定义常量_高清 1080P 01:09 7、string 类_...
#include <iostream>#include <string>#include <iostream>using namespace std;namespace B{int a = 20;void func(){cout << "B" <<endl;}void func(int a){cout << "func with a" <<endl;}}void test(){using B::func;func(1);}int main(int argc, char* argv[]){test();return 0;} ...
W4#include<sal.h>#include<new>#include<iostream>usingnamespacestd; _Analysis_mode_(_Analysis_local_leak_checks_)voidf(){char*p1 =nullptr;char*p2 =nullptr;try{ p1 =newchar[10]; p2 =newchar[10];// code ...delete[] p2;delete[] p1; }catch(constbad_alloc& ba) {cout<< ba.what(...
#include<iostream>#include<type_traits>#include<string>usingnamespacestd;template<typenameT>voidfunc(T&& param){if(std::is_same<string, T>::value) std::cout <<"string"<< std::endl;elseif(std::is_same<string&, T>::value) std::cout <<"string&"<< std::endl;elseif(std::is_same...
string name2; int stop=36; while(stop!=0) { if(p->size==0)/*判断一下联系人是否为0, { cout << "请输入姓名"<< endl; cin>>name2; p->personarray[lbk]p->size[rbk].name= name2; break; } else { for(int i = 0; i size; i++) { if(p->personarray[lbk]i[rbk].name==...
'System': a namespace with this name does not exist 'winsdkver.h': No such file or directory ‘ClassName::FunctionName’ : ‘static’ should not be used on member functions defined at file scope C++ "abc.exe" is not a valid win32 application "Access denied" when trying to get a hand...
using namespace std; int main(){ string str = "http://c.biancheng.net"; char ch1 = str[100]; //下标越界,ch1为垃圾值 cout<<ch1<<endl; char ch2 = str.at(100); //下标越界,抛出异常 cout<<ch2<<endl; return 0; } 1. 2. ...
Also, the destructor for anonymous structure members in a union is no longer implicitly called when the union goes out of scope. Consider the following code, in which a union U contains an anonymous structure that contains a named member structure S that has a destructor. C++ Copy #include...