public member function
<string>
void push_back (charT c);
Append character to string
示例
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// string::push_back
#include <iostream>
#include <fstream>
#include <string>
int main ()
{
std::string str;
std::ifstream file ("test.txt",std::ios::in);
if (file) {
while (!file.eof()) str.push_back(file.get());
}
std::cout << str << '\n';
return 0;
}
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This example reads an entire file character by character, appending each character to a string object usingpush_back.
複雜度
Unspecified; Generally amortized constant, but up to linear in the new string length.
迭代器有效性
與此物件相關的任何迭代器、指標和引用都可能失效。