'Bash ./main: No such file or directory' error while trying to execute a C++ program

The code snippet:

#include <iostream> using namespace std; int main(){ unsigned int a, b, diff; cin>>a>>b; diff = a - b; if(diff % 10 == 9){ diff--; }else{ diff++; } cout<<diff; return 0; } 

The command used to compile:

g++ -Wall -Wextra -Werror -c main.cpp -o main.o 

The error:

bash: ./main: No such file or directory 

Error when 'main.o' is used:

bash: ./main.o: Permission denied 

I am using Ubuntu 16.04 LTS.

1 Answer

g++ -Wall -Wextra -Werror main.cpp -o main 

Don't use the -c flag if you want to create an executable.

 ./main 

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