C++ std::basic_istream::gcount()用法及代码示例

// C++ code to illustrate std::gcount() 
  
#include <bits/stdc++.h> 
using namespace std; 
  
// Driver Code 
int main() 
{ 
  
    // Initialise array of characters 
    char arr[20]; 
  
    // Declare string stream 
    istringstream stream("GeeksforGeeks"); 
  
    // Read the string in string stream 
    stream.read(arr, sizeof arr); 
  
    // Print the count of characters in 
    // string "GeeksforGeeks" 
    cout << "The count of characters"
         << " in the string "
         << " is " << stream.gcount() 
         << endl; 
  
    return 0; 
}