所以在这里我得到的代码可以计算文件中字符和单词的行数。现在我需要为多个文件实现相同的功能。基本上我的代码应该读取每个文件中的字符和行的数量，并且应该产生总共的字符和行（将每个文件中的字符和行的数量相加。我还需要帮助执行代码形式不良的参数，找不到文件，以及无法识别的参数。这是我的代码，我试着编译它，但它只能读取每个文件中的字符和字符的数量而不是总计。谢谢你们。任何帮助都会非常感谢或建议。
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
using namespace std;
int main(int argc, char*argv[])
{
if (argc<2){
cout<<"You did not enter enough arguments, Please try again, close this cd window and enter the correct filename"<<endl;
}
else{
string filename;
ifstream thefile;
int i;
for(i=1,i<=argc;(i++);){
filename=argv[i];
int charactercounter=0, linecounter=1, wordcounter=1, totalLines, totalWords,totalCharacters;
thefile.open(filename);
if(!thefile.is_open()){
cout<<"file does not exist"<<endl;
}
else if(thefile.fail()){
cout<<"arguments can't be recognized"<<endl;
}
if(thefile.is_open() && thefile.good()){
while(!thefile.eof()){
char ch;
while(ch!=EOF){
charactercounter++;
totalCharacters=totalCharacters+charactercounter;
if (ch=='\n')
linecounter++;
totalLines=totalLines+linecounter;
if (ch==' ')
wordcounter++;
totalWords=totalWords+wordcounter;
ch=thefile.get();
}
}
cout<<setw(12)<<"Lines"<<' '<< linecounter;
cout<<' ';
cout<<setw(12)<<"words"<<' '<< wordcounter;
cout<<' ';
cout<<setw(12)<<"characters"<<' '<< charactercounter;
cout<<' ';
cout<<setw(12)<<"filename"<<' '<<argv[i];
cout<<' ';
cout<<setw(12)<<"totallines"<<' '<<totalLines;
cout<<' ';
cout<<setw(12)<<"totalwords"<<' '<<totalWords;
cout<<' ';
cout<<setw(12)<<"totalchars"<<' '<<totalCharacters;
cout<<' ';
thefile.close();
}
}
}
}
答案 0 :(得分：0)
添加了一些注释，函数和类，以使代码更易于阅读。
我也尝试保留程序中的错误。
#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
using namespace std;
// -----------------------------------------------------------------------------
bool argc_checker(const int argc, const char* const argv[]) {
// Check commandline arguments
// If no problem, return true. Otherwise, return false.
if (argc < 2) {
cout << "You did not enter enough arguments, Please try again, "
"close this cd window and enter the correct filename" << endl;
return false;
}
return true;
}
// -----------------------------------------------------------------------------
bool check_file(const ifstream& thefile) {
// Return true if the file is ok. Otherwise, return false
if (!thefile.is_open()) {
cout << "file does not exist" << endl;
return false;
}
if (thefile.fail()) {
cout << "arguments can't be recognized" << endl;
return false;
}
if (thefile.is_open() && thefile.good()) {
return true;
}
return false;
}
// -----------------------------------------------------------------------------
class Word_counter {
// Count the number of character, words, and lines by taking characters
// one by one.
public:
Word_counter() { reset(); }
void take(const char ch) {
++_n_chars;
if (ch == ' ') ++_n_words;
if (ch == '\n') ++_n_lines;
}
void reset() {
// Reset the word counter.
_n_chars = 0;
_n_words = 1;
_n_lines = 1;
}
const int n_chars() const { return _n_chars; }
const int n_words() const { return _n_words; }
const int n_lines() const { return _n_lines; }
private:
int _n_chars;
int _n_words;
int _n_lines;
};
// -----------------------------------------------------------------------------
class Total_word_counter {
// Take a word counter and add its count to total counts.
public:
Total_word_counter() { reset(); }
void take(const Word_counter& wc) {
_n_total_chars += wc.n_chars();
_n_total_lines += wc.n_lines();
_n_total_words += wc.n_words();
}
void reset() {
// Reset the total word counter
_n_total_chars;
_n_total_lines;
_n_total_words;
}
const int n_total_chars() const { return _n_total_chars; }
const int n_total_words() const { return _n_total_words; }
const int n_total_lines() const { return _n_total_lines; }
private:
int _n_total_chars;
int _n_total_words;
int _n_total_lines;
};
// -----------------------------------------------------------------------------
template <typename T>
void simple_print_table(const std::string& name, const T& thing) {
cout << setw(12) << name << ' ' << thing << ' ';
}
// -----------------------------------------------------------------------------
int main(int argc, char *argv[]) {
// check if arguments are ok. if not, exit the program.
if (!argc_checker(argc, argv)) exit(1);
// Create word counters
Word_counter wc;
Total_word_counter total_wc;
// loop over each commandline argument
for (int i = 1, i <= argc; (i++); ) {
string filename(argv[i]);
ifstream the_file(filename);
// check if file is ok. if not skip to next cycle of the for loop.
if (!check_file(the_file)) {
the_file.close();
continue;
}
// loop over each character of the_file.
char ch;
while (!the_file.eof() && (ch != EOF)) {
wc.take(ch);
ch = the_file.get(); // pass each char to the word counter
}
total_wc.take(wc); // add result of word counter to total_wc
// Print result of counting
simple_print_table("Lines", wc.n_lines());
simple_print_table("words", wc.n_words());
simple_print_table("characters", wc.n_chars());
simple_print_table("totallines", total_wc.n_total_lines());
simple_print_table("totalwords", total_wc.n_total_words());
simple_print_table("totalchars", total_wc.n_total_chars());
// Rest word counter
wc.reset(); // reset the wc so it is ready to count next file
// Close the file
the_file.close();
}
}
// -----------------------------------------------------------------------------