Compilare: main.cpp: In function 'int val(int)': main.cpp:10:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i=1;i<p;i++) ^~~ main.cpp:13:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 1; ^~~~~~ main.cpp: In function 'void bk(int)': main.cpp:35:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if (val(p)) ^