C++入门 模仿mysql控制台输出表格

一、 说明

控制台输出表格，自适应宽度

二、 源码

#include <iostream>
#include <map>
#include <string>
#include <vector>

using namespace std;

void printTable(vector<vector<string>> *pTableData)
{
    int row = pTableData->size();
    int column = (*pTableData)[0].size();

    vector<int> cloumnWidth;
    for (int i=0;i<column;i++)
    {
        cloumnWidth.push_back(0);
    }

    for(int i=0;i<row;i++)
    {
        for (int j = 0; j < column; j++)
        {
            if ((*pTableData)[i][j].size() > cloumnWidth[j])
            {
                cloumnWidth[j] = (*pTableData)[i][j].size();
            }
        }
    }

    //绘制表格
    int tableRow = row * 2 + 1;
    for (int i = 0; i < tableRow; i++)
    {
        if (i % 2 == 0)
        {
            //+--------------+
            for (int j=0;j<column;j++)
            {
                if (j == 0)
                {
                    cout << "+";
                }
                for (int k=0;k< cloumnWidth[j];k++)
                {
                    cout << "-";
                }
                cout << "+";
            }
            cout << endl;
        }
        else
        {
            //数据行
            for (int j = 0; j < column; j++)
            {
                if (j == 0)
                {
                    cout << "|";
                }
                string content = (*pTableData)[i / 2][j];
                //补空
                int emptySize = cloumnWidth[j]- content.size();
                for (int k = 0; k < emptySize; k++)
                {
                    content.append(" ");
                }
                cout << content;
                cout << "|" ;
            }
            cout << endl;
        }
    }
}


int main()
{
    vector<vector<string>> tableData;

    for (int i=0;i<2;i++)
    {
        vector<string> vec;
        vec.push_back("");
        vec.push_back("");
        vec.push_back("");
        tableData.push_back(vec);
    }

    tableData[0][0] = "aaa";
    tableData[0][1] = "1234";
    tableData[0][2] = "qwer";
    tableData[1][0] = "bbbb";
    tableData[1][1] = "123";
    tableData[1][2] = "qwert";

    printTable(&tableData);
}

三、 运行效果