C++中的字符串转数组

Input:

[[1,2,3][11,12,13]]

belike

A = 1  2  3
    11 12 13

1. istringstream

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

vector<vector<int>> result;
string line = input;
string current;

// 去掉最外层括号
for (auto &c : line) {
    if (c == '[' || c == ']')
        current += c; // 保留括号来分隔
    else if (c == ',')
        current += ' '; // 用空格替换逗号
    else
        current += c;
}
istringstream iss(current);
string token;
while (iss >> token) {
    if (token[0] == '[') {
        vector<int> row;
        while (iss >> token && token[0] != ']') {
            row.push_back(stoi(token));
        }
        result.push_back(row);
    }
}

2. auto i:line

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

string line;
getline(cin,line);

vector<vector<int>>nums;
vector<int>row;
int num=0;
for(auto i:line){
    if(isdigit(i)){
        num=num*10+i;
    }
    else {
        row.push_back(num);
        num=0;
        if(i==']'){
            nums.push_back(row);
            row.clean();
        }
    }
}