Compilare: user.cpp: In function ‘int main()’: user.cpp:25:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses] {if(v1[i]=!v2[i]) sw=0;v1[i]=0;v2[i]=0;} ^ /tmp/cc0h88Ax.o: In function `main': user.cpp:(.text.startup+0x7c): warning: the `gets' function is dangerous and should not be used.