Compilare: user.cpp: In function ‘int main()’: user.cpp:14:11: warning: unused variable ‘cr’ [-Wunused-variable] int i,cr,m=0; ^~ user.cpp: In function ‘void input()’: user.cpp:43:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for (int i=1;i<=n;i++) ^~~ user.cpp:45:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ in.close(); ^~