C++中使用ifstream读取txt文件,txt文件如上图,前三列是坐标信息,最后一列没有价值;怎样只读取前三列,跳过第四列?
8条回答 默认 最新
- 波塞冬的祝福 2021-04-20 22:50关注
#include <iostream> #include <fstream> #include <string> using namespace std; int main(){ ifstream in("D://1.txt"); char str[1000]; int icount = 0; while (in.getline(str, 1000)) { std::string test = str; string a = test.substr(0, test.find_first_of(" ")); test = test.substr(test.find_first_of(" ") + 1, test.length()); string b = test.substr(0, test.find_first_of(" ")); test = test.substr(test.find_first_of(" ") + 1, test.length()); string c = test.substr(0, test.find_first_of(" ")); test = test.substr(test.find_first_of(" ") + 1, test.length()); cout << a<<b<<c << endl; } }
本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏 举报