Compilare: user.cpp: In function ‘int main()’: user.cpp:15:19: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (v[j] >= 'a' && v[j] <= 'z' || v[j] >= 'A' && v[j] <= 'Z') ^ user.cpp:20:19: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (v[i] >= 'a' && v[i] <= 'z' || v[i] >= 'A' && v[i] <= 'Z') { ^