Question

我使用此代码计算文本行数，但我还需要计算单词并显示以控制每行中有多少单词。

int main(int argc, char *argv[]){

    ifstream f1("text.txt"); ;
    char c;
    string b;
    int numchars[10] = {}, numlines = 0;

    f1.get(c);
    while (f1) {
        while (f1 && c != '\n') {

           // here I want to count how many words is in row
        }

        cout<<"in row: "<< numlines + 1 <<"words: "<< numchars[numlines] << endl;
        numlines = numlines + 1;
        f1.get(c);
   }

   f1.close();
   system("PAUSE");
   return EXIT_SUCCESS;
}

Answer 1

要计算您可以尝试的行数和单词数，并将其制成两个简单的任务：首先使用getline()从文本中读取每一行，然后使用{从行中提取每个单词{3}}，在每次成功（读取行或提取词）操作后，您可以增加两个表示行数和单词数的变量。

以上可以这样实现：

ifstream f1("text.txt"); 
// check if file is successfully opened
if (!f1) cerr << "Can't open input file.";

string line;
int line_count = 0

string word;
int word_count = 0;

// read file line by line
while (getline(f1, line)) {

    // count line
    ++line_count;

    stringstream ss(line);

    // extract all words from line
    while (ss >> word) {

        // count word
        ++word_count;
    }
}

// print result
cout << "Total Lines: " << line_count <<" Total Words: "<< word_count << endl;

c ++计算行数

1 个答案: