inta[3]={0};// valid C and C++ way to zero-out a block-scope arrayinta[3]={};// valid C++ way to zero-out a block-scope array; valid in C since C23 As with all otherinitialization, every expression in the initi
inta[3]={0};// valid C and C++ way to zero-out a block-scope arrayinta[3]={};// valid C++ way to zero-out a block-scope array; valid in C since C23 As with all otherinitialization, every expression in the initializer list must be aconstant expressionwhen initializing arrays of st...
array initializationfor the initialization of array types struct initializationfor the initialization of struct and union types. Implicit initialization If an initializer is not provided: objects with automaticstorage durationare initialized to indeterminate values (which may betrap representations) ...
Initialization Functions Statements Headers Type support Program utilities Variadic functions Diagnostics library Dynamic memory management Strings library Null-terminated strings: byte−multibyte−wide Date and time library Localization library Input/output library ...
Initialization Functions Statements Headers Type support Program utilities Variadic functions Diagnostics library Dynamic memory management Strings library Null-terminated strings: byte−multibyte−wide Date and time library Localization library Input/output library ...
#include <algorithm>#include <array>#include <iostream>#include <iterator>#include <string>int main(){#include <algorithm>#include <array>#include <iostream>#include <iterator>#include <string>int main(){// construction uses aggregate initializationstd::array<int, 3> a1{{1, 2, 3}}; //...
if( x < 0 ) break; cout << x << endl; x++; } break语句只能跳出本层循环,假如你要跳出一个三重嵌套的循环,你就要使用包含其它的逻辑或者用一个goto语句跳出这个嵌套循环. case 在switch里面用来检测匹配 . default,switch catch catch 语句通常通过throw语句捕获一个异常. ...
Otherwise, ifTis a character array and the brace-enclosed initializer list has a single initializer clause that is an appropriately-typed string literal, the array isinitialized from the string literal as usual. Otherwise, ifTis anaggregate type,aggregate initializationis performed. ...
Initialization Functions Statements Headers Type support Program utilities Variadic functions Diagnostics library Dynamic memory management Strings library Null-terminated strings: byte − multibyte − wide Date and time library Localization library Input/output library Algorithms library Nume...
initialization list vector<int> myVec(numbers4); // a vector initialized with the elements of numbers4 int val = myVec.at(index); // return the value of the element located at index of myVec int* arr = myVec.data(); // return the underlying int array of myVec myVec.push_back(...