Anonymous user
Arithmetic/Complex: Difference between revisions
→{{header|Erlang}}
Line 892:
0.5-0.5i
-1-1i</pre>
=={{header|Dart}}==
<lang dart>
class complex {
num real=0;
num imag=0;
complex(num r,num i){
this.real=r;
this.imag=i;
}
complex add(complex b){
return new complex(this.real + b.real, this.imag + b.imag);
}
complex mult(complex b){
//FOIL of (a+bi)(c+di) with i*i = -1
return new complex(this.real * b.real - this.imag * b.imag, this.real * b.imag + this.imag * b.real);
}
complex inv(){
//1/(a+bi) * (a-bi)/(a-bi) = 1/(a+bi) but it's more workable
num denom = real * real + imag * imag;
double r =real/denom;
double i= -imag/denom;
return new complex( r,-i);
}
complex neg(){
return new complex(-real, -imag);
}
complex conj(){
return new complex(real, -imag);
}
String toString(){
return this.real.toString()+' + '+ this.imag.toString()+'*i';
}
}
void main() {
var cl= new complex(1,2);
var cl2= new complex(3,-1);
print(cl.toString());
print(cl2.toString());
print(cl.inv().toString());
print(cl2.mult(cl).toString());
}
</lang>
=={{header|Erlang}}==
| |||