Compilare: main.cpp: In function 'void down(int)': main.cpp:38:18: warning: pointer to a function used in arithmetic [-Wpointer-arith] down[2*p]; ^ main.cpp:38:18: warning: value computed is not used [-Wunused-value] down[2*p]; ~~~~~~~~^ main.cpp:38:18: warning: statement has no effect [-Wunused-value] main.cpp: In function 'void add(int)': main.cpp:47:9: warning: pointer to a function used in arithmetic [-Wpointer-arith] up[l]; ^ main.cpp:47:9: warning: value computed is not used [-Wunused-value] up[l]; ~~~~^ main.cpp:47:9: warning: statement has no effect [-Wunused-value] main.cpp: In function 'int main()': main.cpp:60:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i=1;i<=l;i++) ^~~ main.cpp:62:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~