Original Post
hey all.. i think this be too lame for you guys (girls too), but im new to programming and not that far with math in school yet. i had an assignment on vectors. had to calc a vectors coords from the scalarproduct of two other vectors. (im from DK, so dont know if "scalarproduct" has any meaning in eng. but in math: vecA . vecB = (A1 * B1) + (A2 * B2)) anyways, it gave me an idea to a program; to calc the vecA and B's coords from this formula with only the scalarproduct given. like 6 = (A1 * B1) + (A2 * B2). i realised that there was alot of combinations, so to start with i made the program to calc the number of combinations. but it prints ALOT of numbers, so i want to ask if i made a programming error/math error. or if there actually is that meany combinations aka im a dumbass to math. well heres the code: looking forward to hear if im dumb or :) thanks - niux EDIT: fixed source tags
#include <iostream>
#include <string>
#include <math.h>
using namespace std;
int c;
int result;
int counts;
int main()
{
cout << "syntax: k = a1 * b1 + a2 * b2\n";
cout << "c= ";
cin >> c;
for(int a1 = 0; a1<10; a1++) {
for(int a2 = 0; a2<10; a2++) {
for(int b1 = 0; b1<10; b1++) {
for(int b2 = 0; b2<10; b2++) {
result = (a1*a2)+(b1*b2);
if(result == c)
counts++;
cout << counts;
/*cout << "done!: ";
cout << "a1= " << a1 << endl;
cout << "a2= " << a2 << endl;
cout << "b1= " << b1 << endl;
cout << "b2= " << b2 << endl;*/
}
}
}
}
return 0;
}