logic circuit truth table

i have to write a program that gives the truth table of the digital logic circuit(with only logic gates like AND,OR,EXOR etc.)the circuit is user defined. i'm in trouble with defining the circuit which the user gives. for example maybe like pspice,but ı can not find any way...please help me,its urgent... :confused:

Quote:

---

please help me,its urgent

---

Isn't it always

Given two conditions a and b:
AND:

Code:

---

if ( a && b)

---

Or:

Code:

---

if ( a || b )

---

XOR:

Code:

---

if ( (a || b) && (a != b) )

---

the gates are ok,ı m in trouble with define the circuit,for example a circuit with 2 AND 3 OR gates,how to define that for example,the output of 1. AND is in the same node with the 1. input of 1. OR ,is it ok??

Code:

---

if (homework && urgent && !postedcode)
{
  delayPoster(indefinitely);
}

---