Compilare: user.cpp: In function ‘int eval()’: user.cpp:26:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(*p='+') ^ user.cpp:31:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(*p='-') ^ user.cpp:37:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int termen()’: user.cpp:44:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(*p='*') ^ user.cpp:49:18: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(*p='/') ^ user.cpp:55:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int factor()’: user.cpp:60:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(*p='(') ^