顧名思義,std::generate是一種STL算法,用於根據生成器函數生成數字,然後將這些值分配給容器中[第一個,最後一個]範圍內的元素。
生成器函數必須由用戶定義,並被連續調用以分配編號。
模板函數:
void generate (ForwardIterator first, ForwardIterator last, Generator gen); first: Forward iterator pointing to the first element of the container. last: Forward iterator pointing to the last element of the container. gen:A generator function, based upon which values will be assigned. 返回: none Since, it has a void return type, so it does not return any value.
// C++ program to demonstrate the use of std::generate
#include <iostream>
#include <vector>
#include <algorithm>
// Defining the generator function
int gen()
{
static int i = 0;
return ++i;
}
using namespace std;
int main()
{
int i;
// Declaring a vector of size 10
vector<int> v1(10);
// using std::generate
std::generate(v1.begin(), v1.end(), gen);
vector<int>::iterator i1;
for (i1 = v1.begin(); i1 != v1.end(); ++i1) {
cout << *i1 << " ";
}
return 0;
}
輸出:
1 2 3 4 5 6 7 8 9 10
下一個: C++中的std::generate_n
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注:本文由純淨天空篩選整理自 std::generate in C++。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。