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Babbage did not invent the typewriter - he invented the Difference Engine and the Analytical Engine: mechanical mathematical processors. His purpose in designing those was to simplify and improve the accuracy of complex, repetitive arithmetic operations.
The complex roots of an equation are the complex numbers that are solutions to the equation.
#include<iostream.h> #include<conio.h> class complex { int r; int i; public: complex() { } complex(int a,int b) { r=a;i=b; } friend complex operator+(complex,complex); friend show(complex); complex operator+(complex c1,complex c2) { complex c3; c3.r=c1.r+c2.r; c3.i=c1.i+c2.i; return(c3); } show(complex c) { cout<<c.r<<"i+"<<c.i<<endl; } void main() { complex a,b,c; clrscr(); a.complex(3,6); b.complex(4,7); c=a+b; show(a); show(b); show(c); getch() }