Compilare: main.cpp: In function 'int main()': main.cpp:25:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i = 1; i <= n; i++) ^~~ main.cpp:28:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' ok = true; ^~ main.cpp:22:10: warning: unused variable 'l' [-Wunused-variable] char l; ^