运行 ID: 46481

Main.cc: In function ‘int main()’:
Main.cc:5:22: error: redeclaration of ‘int m’
     int n,m,n1,m1,n2,m;
                      ^
Main.cc:5:11: note: ‘int m’ previously declared here
     int n,m,n1,m1,n2,m;
           ^
Main.cc:8:19: error: ‘m2’ was not declared in this scope
  cin>>n1>>m1>>n2>>m2; 
                   ^~
Main.cc:8:19: note: suggested alternative: ‘n2’
  cin>>n1>>m1>>n2>>m2; 
                   ^~
                   n2