之字型打印矩阵 PAT差错

Question

抠了好长时间, 也不知道为什么4， 5没有读入
把当成string，每次读完一个字符串（数字）就转化int放入vector, 读字符串的条件是直到遇到, 或者[, ]

#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main()
{
    string str;
    cin >> str;
    vector <int> v;
    string temp = "";

    for (int i = 2; i < str.length(); i++)
    {
        if ( str[i] != ',' && str[i] != ']'  && str[i] != '[')//  ||  -->  &&
        {
            temp += str[i];
        }
        else
        {
            if (temp != "")
            {
                v.push_back(stoi(temp));
            }
            temp = "";
        }
    }
    int sz = v.size();
    int cnt = 0;

    int n = v[sz - 2];
    int m = v[sz - 1];

    int total = sz - 2;
    cout << "[";
    bool flag = false;
    int start = 0;
    int end = 0;

    for (int i = 0; i < n; i++)
    {
        if (i % 2 == 0)
        {
            start = i * m;
            end = (i + 1) * m - 1;
            for (int k = start; k < end; k++)
            {
                if (!flag)
                {
                    cout << v[k];
                    flag = true;
                }
                else
                {
                    cout << "," << v[k];
                }
            }
        }
        else
        {
            start = (i + 1) * m - 1;
            end = i * m;
            for (int k = start; k > end; k--)
            {
                cout << "," << v[k];
            }
        }
    }
    cout << "]";
}

Answer 1

不知道你怎么输入的，遇空字符（包括空格、回车、TAB、分割符号）表示一个输入的结束，cin不会读取后面的字符串，除非多次读取。

你要问的是这个问题么？https://blog.csdn.net/baidu_25107219/article/details/51606523?locationNum=6&fps=1