Compilare: user.cpp: In function ‘long long int eval(char*)’: user.cpp:15:15: warning: variable ‘w’ set but not used [-Wunused-but-set-variable] long long w,x,y,z,z1,z2,q,i,t,m; ^ user.cpp:15:35: warning: variable ‘m’ set but not used [-Wunused-but-set-variable] long long w,x,y,z,z1,z2,q,i,t,m; ^ user.cpp:16:10: warning: unused variable ‘s1’ [-Wunused-variable] char s1[260]; ^ user.cpp: In function ‘int main()’: user.cpp:92:27: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[260]’ [-Wformat=] scanf("%s",&s3); ^