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C++ 在更改与循环无关的内容后陷入无限循环

转载 作者：行者123 更新时间：2023-11-28 01:52:53 27 4
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我编写了这段代码并让它运行良好，但是存在一些格式错误，所以我更改了一些代码并添加了一个 else if 语句，我在代码中用注释标记了该语句。

#include <string>
#include <iostream>
#include <fstream>
#include <ctype.h>

using namespace std;

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

/*if (argc != 3) {
    cout << "Error: wrong number of arguments." << endl;
}*/

ifstream infile(argv[1]);
//infile.open(argv[1]);

string content((std::istreambuf_iterator<char>(infile)),
    (std::istreambuf_iterator<char>()));

string final;
string temp;
string distinct[5000];
string look;
int distinctlen = 0;
int distinctnum[5000] = { 0 };
int numdist = 0;
int wordcount = 0;
int i = 0;
int j = 0;
int k = 0;
int quest = 0;
int isdistinct = 0;
int ismatch = 0;
int qmatch = 0;
int len = content.length();
bool wordprinted = false;
//cout << "test 1" << endl;
//cout << "length of string: " << len << endl;
//cout << "content entered: " << content << endl;
while (i < len) {

    //cout << "test 2" << endl;
    if (isalpha(content[i])) {
        //cout << "test 3" << endl;
        if (isupper(content[i])) {
            //cout << "test 4" << endl;
            temp.push_back(tolower(content[i]));

        }
        else {
            //cout << "test 5" << endl;
            temp.push_back(content[i]);

        }
    }
    else {
        //cout << temp << endl;
        //cout << "test 6" << endl;
        ++wordcount;
        final = final + temp;
        j = 0;
        for (k = 0;k < numdist;k++) {
            //cout << "test 7" << endl;
            if (distinct[k] == temp) {
                ++distinctnum[k];
                isdistinct = 1;
                break;
            }
        }
        if (isdistinct == 0) {
            //cout << "test 8" << endl;
            distinct[numdist] = temp;
            ++numdist;
        }
        temp.clear();
        isdistinct = 0;
    }
    //cout << temp << endl;
    ++i;
}
//cout << final << endl << endl;
cout << "The number of words found in the file was " << wordcount + 1 << endl;
cout << "The number of distinct words found in the file was " << numdist + 1 << endl << endl;

ifstream infile2(argv[2]);
string query((std::istreambuf_iterator<char>(infile2)),
    (std::istreambuf_iterator<char>()));
//cout << query << endl;
query += ' ';

int len2 = query.length();
int looklen;
//cout << quest << endl;
for (i = 0;i < len2;i++) {
    if (query[i] == '?') {
        quest = 1;
    }
    else if (isspace(query[i])) {
        //cout << "test1" << endl;
        if (quest == 0) {
            //cout << "test2" << endl;
            for (j = 0;j < numdist;j++) {
                if (look == distinct[j]) {
                    ismatch = 1;
                    cout << look << " : matches " << look << " " << distinctnum[j]+1 << " time(s)." << endl;
                    break;
                }
            }
            if (ismatch == 0) {
                cout << look << " : no match." << endl;
            }
            ismatch = 0;
        }
        else {
            //cout << "test" << endl;
            looklen = look.length();
            //cout << looklen << " " << look << endl;
            for (j = 0;j < numdist;j++) {

                for (k = 0;k < looklen;k++) {

                    //cout << k << endl;
                    if (looklen < distinct[j].length()) {
                        break;
                    }
                    if (look[k] == '?' && (k + 1) == looklen && wordprinted == false) {
                        cout << look << " : matches " << distinct[j] << " " << distinctnum[j] + 1 << " time(s)." << endl;
                        k++;
                        wordprinted = true; //NEW LINE ADDED
                        cout << "wordprinted = true" << endl;
                        break;
                    }
                    else if (look[k] == '?' && (k+1) == looklen && wordprinted == true) { //NEW CODE ADDED THAT BROKE IT
                        for (i=0;i < looklen;i++) {
                            cout << " ";
                        }
                        cout << "   ";
                        cout << "matches " << distinct[j] << " " << distinctnum[j] + 1 << " time(s)." << endl;
                        break;
                    }
                    else if (look[k] == distinct[j][k]) {
                        k++;
                    }
                    else if (look[k] == '?') { //check for space
                        k++;
                        continue;
                    }

                    else if (look[k] != distinct[j][k]) {
                        break;
                    }
                    if ((k + 1) == looklen) {
                        //cout << "test3" << endl;
                        cout << look << " : matches " << distinct[j] << " " << distinctnum[j] + 1 << " time(s)." << endl;
                        break;
                    }

                }

            }
            wordprinted = false;
            cout << "wordprinted = false" << endl;
        }
        look.clear();
        continue;
    }
    look.push_back(query[i]);
    //cout << "test" << endl;
    cout << len2 << endl;

}
return 0;

我得到的输出的一小段摘录:

wordprinted = false
22
wordprinted = false
22
22
22
wordprinted = false
22
22
22
a?? : matches and 4 time(s).
wordprinted = true
matches as 1 time(s).
matches a 1 time(s).
wordprinted = false
22
wordprinted = false
22
22
22
wordprinted = false
22
22
22
a?? : matches and 4 time(s).
wordprinted = true
matches as 1 time(s).
matches a 1 time(s).

27 4 0
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