我目前正在尝试构建一个读取文件的程序,扫描该文件,并输出该文件中被“标记”包围的所有单词。我目前很难过,希望得到一些帮助!
#include <iostream>
// For file I/O:
#include <fstream>
#include <cstdlib>
#include <iomanip>
using namespace std;
// Prototype the count function so we can have it below it's first
// use in main().
void count(istream& in, int& lines, int& words, int& characters);
/*
* wc <filename>
*/
int main(int argc, char *argv[])
{
if (argc < 2) {
cerr << "Usage: wc <filename>" << endl;
return 0;
}
// Open the file specified by argv[1] for reading:
// Constructs a ifstream object called "in":
ifstream in(argv[1]);
// Was there a problem opening the file?
if (!in.good()) {
cerr << "Unable to open file [" << argv[1] << "] for reading." << endl;
return 1;
}
int lines = 0, words = 0, characters = 0;
count(in, lines, words, characters);
cout << setw(5) << lines << " " << words << " " <<
characters << " " << argv[1] << endl;
// Close the input stream:
in.close();
}
void count(istream& in, int& lines, int& words, int& characters)
{
int i;
char s;
int ch;
bool inword = false;
// Read until the end of file is reached, or there was an error:
while (!in.eof()) {
// Read a character from the input stream "in":
s = in.get(); //Set char s = in.get
for(i=0; s != 0; i++){ //Loop to iterate through the characters
while(s == '"'){ //While s is equal "
cout << s << endl; // Print s
if(s == '"') // If we hit another ", then we break
break;
}
}
if (in.good() == false) return;
characters++;
if (!isspace(ch) && !inword) {
inword = true;
words++;
} else if (isspace(ch) && inword) {
inword = false;
}
if (ch == '\n') lines++;
}
}
答案 0 :(得分:0)
你的算法似乎错了..在for循环中你比较了&#39; s&#39;但是你没有更新它...在你的主循环(QnD)中试试这样的东西:
while (!in.eof() && (s = in.get()) != '"'); // read to first quote char
/* this is the word we want.. run to end quote marks.. */
while (!in.eof() && (s = in.get()) != '"') {
cout << s;
}
cout << endl;