Compilare: user.cpp: In function ‘int eval_P()’: user.cpp:43:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(s[poz] >= '0' && s[poz] <= '9' || s[poz] == '-') ^ user.cpp: In function ‘int eval_p()’: user.cpp:57:27: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(s[poz] >= '0' && s[poz] <= '9' || s[poz] == '-') S = numar(); ^ user.cpp:65:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(s[poz] >= '0' && s[poz] <= '9' || s[poz] == '-') ^ user.cpp: In function ‘int main()’: user.cpp:83:21: warning: NULL used in arithmetic [-Wpointer-arith] while(s[poz] != NULL) ^ user.cpp:92:21: warning: NULL used in arithmetic [-Wpointer-arith] while(s[poz] != NULL) ^ user.cpp:94:26: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(s[poz] >= '0' && s[poz] <= '9' || s[poz] == '-') sum += numar(); ^ user.cpp: In function ‘int eval_p()’: user.cpp:53:9: warning: ‘S’ may be used uninitialized in this function [-Wmaybe-uninitialized] int S, smax= -999999, smin = 999999; ^