Compilare: user.cpp: In function ‘int ingrediente(int, int&)’: user.cpp:78:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:108:18: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[i]>='a' && s[i]<='z' || s[i]>='0' && s[i]<='9') ^ user.cpp:113:11: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] s[loc]=NULL; ^ user.cpp:81:25: warning: unused variable ‘ok’ [-Wunused-variable] int n,i,tt,nr,loc,j,ok,k; ^ user.cpp:81:28: warning: unused variable ‘k’ [-Wunused-variable] int n,i,tt,nr,loc,j,ok,k; ^