Compilare: main.cpp: In function 'int main()': main.cpp:9:10: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(a=!b) ^ main.cpp:9:1: warning: this 'while' clause does not guard... [-Wmisleading-indentation] while(a=!b) ^~~~~ main.cpp:14:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while' fout<<a; ^~~~