將整個 ASCII 檔案讀入 C++ std::string
這是將整個 ASCII 檔案讀入 C++ 中的 std::string 中的一個簡單方法 −
演算法
Begin Declare a file a.txt using file object f of ifstream type to perform read operation. Declare a variable str of string type. If(f) Declare another variable ss of ostringstream type. Call rdbuf() fuction to read data of file object. Put the data of file object in ss. Put the string of ss into the str string. Print the value of str. End.
示例
#include<iostream>
#include<fstream>
#include<sstream>
#include<string>
using namespace std;
int main() {
ifstream f("a.txt"); //taking file as inputstream
string str;
if(f) {
ostringstream ss;
ss << f.rdbuf(); // reading data
str = ss.str();
}
cout<<str;
}輸入
a.txt data file containing the text “hi”
輸出
hi
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