CExpression::arbore CExpression::expresie()
{
arbore nod;
arbore arb1 = termen();
arbore arb2;
if (arb1 == NULL) return NULL; // In caz de eroare terminate
while ((m_definitie[pozitie]=='-') || (m_definitie[pozitie]=='+')){
nod=new NOD;
nod->left=arb1;
nod->operatie=m_definitie[pozitie];
pozitie++;
arb2 = termen();
nod->right=arb2;
if (arb2 == NULL){
elibmem(nod);
return NULL; // In caz de eroare terminate
}
arb1 = nod;
}
return arb1;
}
float exp()
{
float ts, td;
char c;
oper o;
ts= termen();
if ((x[i+1] == '+') || (x[i+1] == '-'))
{
i++;
if (x[i] == '+')
c= '+';
else
c= '-';
i++;
td= factor();
if (c == '+')
return ts+td;
else
return ts-td;
}
else
return ts;
}
