usingnamespacestd; doublesum(initializer_list<double>il); doubleaverage(constinitializer_list<double>&ril); intmain() { cout<<"sum:"<<sum({2,3,4}) <<", ave:"<<average({2.0,3,4})<<endl; initializer_list<double>dl={1.5,2.5,3.5,4.5,5.5}; cout<<"sum:"<<sum(dl) <<", ave:"...
#include<iostream>#include<future>#include<vector>#include#include<functional>#include<string>#include<algorithm>#include<ctime>#include<initializer_list>#include<stdarg.h>usingnamespacestd;doublesum(intnum, ...){ va_list valist;//创建一个 va_list类型的变量doublesum =0;va_start(valist,num);...
可以将一个initializer_list赋给另一个initializer_list对象(使用初始化列表赋值): initializer _list<double> dl = {1.1,2.2,3.3,4.4,5.5};//initialize a initializer_list<double> object dl = {16.0,25.0,36.0,40.0,64.0};//allowed 总结:提供initializer_list类的初衷旨在能够将一系列值传递给构造函数或其它...
在内森的建议之后，我创建了一个新的受保护的构造函数，它将在my_matrix类中以std::initializer<double...
//调用complex<double>的构造函数时,array内的2个元素被分解并传给//Comlex<double>(double,double)这个带有两个参数的构造函数。因为comlex<double>并无//任何接受initializer_list的构造函数。complex<double> c{4.0,3.0};//等价于c(4.0, 3.0)return0;...
initializer_list对象中的元素永远是常量值,不可能改。 并和vector一样也是一种模板类型,定义时必须指定元素类型 initializer_list<string>ls;initializer_list<double>li; 示例: voiderror_msg(initializer_list<string>lt){for(autobeg=lt.begin();beg!=lt.end();++beg){cout<<*beg<<" ";}cout<<endl;} ...
EIGEN_STRONG_INLINEMatrix(std::initializer_list<std::initializer_list<double>>initlist):Base(){Base::_check_template_params();introws=initlist.size();intcols=initlist.begin()->size();if(base().size()==0){//Emptymatrix, gotta resize itthis->resize(rows,cols);}intinitializer_list_size...
double sum(std::initializer_listil); double average(conststd::initializer_list&ril); int main(intargc,char **argv){ usingstd::cout; usingstd::endl; cout<<"List 1:sum = "<<sum({2,3,4})<<", ,="" 2:sum="<<sum(dl)<<" 3:sum="<<sum(dl)<<" average="<<average(dl)<<end...
structX{X(std::initializer_list<double>v);};Xx{1,2,3}; The initialization will be implemented in a way roughly equivalent to this: constdouble__a[3]={double{1},double{2},double{3}};Xx(std::initializer_list<double>(__a,__a+3)); ...
( std::initializer_list<std::initializer_list<double> > ilist ) : mtx( ilist.size() ) { std::size_t col_size = 0 ;// size of the largest colfor(constauto& row : ilist ) col_size = std::max( col_size, row.size() ) ;for(auto& row : mtx ) row.resize(col_size) ;// ...