Compilare: user.cpp: In function ‘int main()’: user.cpp:23:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(c[i]==')') ^ user.cpp:9:24: warning: unused variable ‘p2’ [-Wunused-variable] int n,i,j,x,l,p1=0,p2=0,a[10000]={0},b[10000]={0}; ^ user.cpp:9:29: warning: unused variable ‘a’ [-Wunused-variable] int n,i,j,x,l,p1=0,p2=0,a[10000]={0},b[10000]={0}; ^ user.cpp:9:42: warning: unused variable ‘b’ [-Wunused-variable] int n,i,j,x,l,p1=0,p2=0,a[10000]={0},b[10000]={0}; ^