Compilare: main.cpp: In function 'int add(int)': main.cpp:25:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int del(int)': main.cpp:32:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(*it==n) ^~ main.cpp:34:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' break; ^~~~~ main.cpp:37:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^