Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:15:9: error: ‘r’ was not declared in this scope r=m%n; ^ user.cpp:8:9: warning: unused variable ‘a’ [-Wunused-variable] int a,b,m,n,cn,cm,cnt=0,op=0; ^ user.cpp:8:11: warning: unused variable ‘b’ [-Wunused-variable] int a,b,m,n,cn,cm,cnt=0,op=0; ^ user.cpp:8:17: warning: unused variable ‘cn’ [-Wunused-variable] int a,b,m,n,cn,cm,cnt=0,op=0; ^ user.cpp:8:20: warning: unused variable ‘cm’ [-Wunused-variable] int a,b,m,n,cn,cm,cnt=0,op=0; ^