Compilare: main.cpp: In function 'int main()': main.cpp:121:38: warning: 'per.punct::j' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << per.i << " " << per.j << " " << s; ^~~ main.cpp:121:22: warning: 'per.punct::i' may be used uninitialized in this function [-Wmaybe-uninitialized] cout << per.i << " " << per.j << " " << s; ^~~