Compilare: user.cpp: In function ‘int pc()’: user.cpp:85:23: warning: integer overflow in expression [-Woverflow] int sm = -(1 << 31) + 1, nr, ini = spz; ^ user.cpp:90:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(expr[p] >= '0' && expr[p] <= '9') ^ user.cpp:86:9: warning: unused variable ‘i’ [-Wunused-variable] int i = 1; ^ user.cpp: In function ‘int pd()’: user.cpp:148:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(expr[p] >= '0' && expr[p] <= '9') ^