|
#2
rjsp2018-08-03 08:50
while (inFile.good()) 当 inFile.good() 成功，就确定 inFile >> ch 能读取成功？？？{ inFile >> ch;  程序代码：#include <iostream> 或者#include <fstream> using namespace std; int main( void ) { size_t count = 0; ifstream infile( "name.txt"); for( char ch; infile>>ch; ) { if( isalpha(ch) ) count += 1; } cout << count << endl; } 程序代码：#include <iostream> #include <fstream> #include <algorithm> #include <iterator> using namespace std; int main( void ) { ifstream infile( "name.txt"); size_t count = count_if( std::istream_iterator<char>(infile), std::istream_iterator<char>(), isalpha ); cout << count << endl; } |
// 3.cpp: 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include<iostream>
#include<string>
#include<cstring>
#include<vector>
#include<array>
#include<ctime>
#include<fstream>
#include<cstdlib>
#include<cctype>
using namespace std;
const int strsize = 20;
struct intribute
{
string name;
double money;
};
int main()
{
char ch;
int count = 0;
ifstream inFile;
inFile.open("name.txt");
while (inFile.good())
{
inFile >> ch;
if (isalpha(ch))
count++;
}
cout << count << endl;
return 0;
}
name.txt
abcde