fstream 输入的基本用法（供个人备忘）

来源：互联网发布：电子软件是什么专业编辑：程序博客网时间：2024/05/21 10:29

简述：从map.txt读取一幅地图信息，然后输出

内容：

1）fstream读取文件

2）getline(fin,strLine)读取文件，并且赋值给字符数组保存

#include <fstream>#include <iostream>#include <string>using namespace std;int main(int argc, char **argv){ifstream fin("map.txt");int width = 21;int height = 19;char *mapInfo = new char[width * height];int cntLine = 0;while(!fin.eof()){string line;getline(fin,line);for(int j = 0;j < width;j++) mapInfo[cntLine * width + j] = line[j];cntLine++;}cout << "MapInfo : " << endl;for(int i = 0;i < height;i++){for(int j = 0;j <width;j++){cout << mapInfo[i * width + j];}cout << endl;}fin.close();return 0;}

map.txt

1111111111111111111111000000000000001010011000010g00001010000011000000000000000000011000000000000000000s11000100000000000000011000000g0001000s000011000001000010000000011000000g0001000100001100000000000010000011100000100000000000001100000000000000000011100100100000100000001100000000000000000001100010000000000000001100000000000000011001100000100010000000001101000000100000010001111111111111111111111

输出：