c++中智能输出文件

首先我们要为每一时间步，设置一个文件名：

　　char timestr[10] = "1";

    itoa(time,timestr,10);

    std::string s;

    s += timestr;

    std::string path = "test_"+s+".txt";

这样传入的整型时间步，就可以添加到输出文件名中；

 

然后，输出文件：

    std::ofstream out(path,std::ios_base::ate);

    std::ofstream out1(path1,std::ios_base::ate);

    int num[300]={0};

    for(k=0;k<mn;k++){

        for(i=0;i<ms;i++){

            if(h_set[i*mn+k] ==1 ){

                for(j=0;j<mn;j++){

                    if(h_set[i*mn+j] == 1 && j != k)

                        neighbour.push_back(j);

                }

            }

        }

        out<<k<<" "<<neighbour.size()<<" ";

        num[neighbour.size()]++;

        for(i=0;i<neighbour.size();i++)

        {

            out<<neighbour[i]<<"(1)"<<" ";

        }

        out<<std::endl;

        neighbour.clear();

    }

    for(k=0;k<300;k++){

        out1<<k<<" "<<num[k]<<std::endl;

    }

这里面，精简下来其实就是

std::ofstream out(path,std::ios_base::ate);

out<<k<<" "<<neighbour.size()<<" ";

        

    for(i=0;i<neighbour.size();i++)

    {

        out<<neighbour[i]<<"(1)"<<" ";

    }

out<<std::endl; //使用这个方法，可以保证每次输出一行数据