运行 ID: 46765

Main.cc: In function ‘int main()’:
Main.cc:16:22: error: ‘x’ was not declared in this scope
    for (int k=i;k>=0;x--){
                      ^
Main.cc:20:23: error: ‘y’ was not declared in this scope
       for (int b=j;b>=y;b--){
                       ^
Main.cc:25:16: error: ‘tmp’ cannot be used as a function
       tmp(i-x+1)*(j-y+1);
                ^
Main.cc:25:21: error: ‘y’ was not declared in this scope
       tmp(i-x+1)*(j-y+1);
                     ^
Main.cc:26:24: error: overloaded function with no contextual type information
       if(tmp>maxn) max=tmp;
                        ^~~