Compilare: user.cpp: In function ‘int main()’: user.cpp:11:14: warning: unused variable ‘lv’ [-Wunused-variable] int i,dr,lv,lc,cv,cc,j,a,b,ct[52]={0},q=0,sem=1,x=0,lg=0,mini,maxi,s=0; ^ user.cpp:11:20: warning: unused variable ‘cv’ [-Wunused-variable] int i,dr,lv,lc,cv,cc,j,a,b,ct[52]={0},q=0,sem=1,x=0,lg=0,mini,maxi,s=0; ^ user.cpp:11:43: warning: unused variable ‘q’ [-Wunused-variable] int i,dr,lv,lc,cv,cc,j,a,b,ct[52]={0},q=0,sem=1,x=0,lg=0,mini,maxi,s=0; ^ user.cpp:11:47: warning: unused variable ‘sem’ [-Wunused-variable] int i,dr,lv,lc,cv,cc,j,a,b,ct[52]={0},q=0,sem=1,x=0,lg=0,mini,maxi,s=0; ^ user.cpp:11:53: warning: unused variable ‘x’ [-Wunused-variable] int i,dr,lv,lc,cv,cc,j,a,b,ct[52]={0},q=0,sem=1,x=0,lg=0,mini,maxi,s=0; ^ user.cpp:11:57: warning: unused variable ‘lg’ [-Wunused-variable] int i,dr,lv,lc,cv,cc,j,a,b,ct[52]={0},q=0,sem=1,x=0,lg=0,mini,maxi,s=0; ^ user.cpp:63:12: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<b-a<<'\n'; ^