Compilare: user.cpp: In function ‘int main()’: user.cpp:70:10: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] fi>>s+1; ^ user.cpp:72:9: warning: unused variable ‘st’ [-Wunused-variable] int st=1,dr=20; ^ user.cpp:72:14: warning: unused variable ‘dr’ [-Wunused-variable] int st=1,dr=20; ^