Visual Studio：无法启动程序，系统找不到指定的文件 Visual Studio 错误？

Question

Here I'm Using visual studio 2019 community edition. I open a folder from file->new->existing project. But whenever i build and run my program. it says

Unable to start program 'O:\1.Fourth semester\programminh\main\Debug\Main2.exe' the system cannot find the file specified

There are lots of programs. like bubble.cpp, binary.cpp but it runs Main2.exe.

Here is my linear.cpp file

#include <iostream>
using namespace std;
int main(){

            int n, an, arr[30], key, i, found=0;
            cout<<"Please enter number of element you want:"<<endl;

            cin>>n;
            cout<<"Please enter the numbers"<<endl;
            for(i=0;i<n;i++){
                cin>>arr[i];
            }


            cout<<"Please Enter the number you want to search"<<endl;
            cin>>key;

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

                if(arr[i] == key){
                    cout<<"Element found at position "<<i+1;

                    found=1;
                    break;
                }
                }


                if(!found){
                    cout<<"Number Not Found"<<endl;
                }








            return 0;


}

Can someone check it out, please?

Answer 1

I open a folder from file->new->existing project.

As far as I'm concerned you should open a.sln file instead of a folder.

You could only run the.sln file (Visual Studio Solution) not a.cpp file.