Compilare: main.cpp: In function 'int main()': main.cpp:38:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int i = 1; i <= len_max; i++) ^~~ main.cpp:40:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~