Compilare: user.cpp: In function ‘int main()’: user.cpp:4:22: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] #define for(i, a, b) for(int i = a; i <= b; i++) ^ user.cpp:31:5: note: in expansion of macro ‘for’ for(i ,1 ,l)cout<<s[l-i+1]<<' ';cout.close(); ^~~ user.cpp:31:37: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ for(i ,1 ,l)cout<<s[l-i+1]<<' ';cout.close(); ^~~~