Compilare: main.cpp:26:15: warning: multi-character character constant [-Wmultichar] cout<<i<<'/n'<<contor<<'/n'; ^~~~ main.cpp:26:29: warning: multi-character character constant [-Wmultichar] cout<<i<<'/n'<<contor<<'/n'; ^~~~ main.cpp: In function 'int main()': main.cpp:10:13: warning: unused variable 'arg' [-Wunused-variable] int n,m,arg,i,j,contor=0; ^~~