Waiting for a function to complete before updating variables - c

Question

I'm still a beginner in programming. I was writing some code (C on Linux) to calculate the page rank of some example webpages. I'm using the google formula, which is here: http link
Here is the code I wrote:
#include <stdio.h>
double iResA, iResB, iResC, iResD, resA, resB, resC, resD;
int outLinksA = 2, outLinksB = 1, outLinksC = 2;
int main(){
// get initial results for all PR
iResA = 0.05 + (0.85 * ((0.33/outLinksB) + (0.33/outLinksC)));
iResB = 0.05 + (0.85 * ((0.33/outLinksA) + (0.33/outLinksC)));
iResC = 0.05 + (0.85 * (0.33/outLinksA));
printf("initial values for all PR:\nA: %.8lf\nB: %.8lf\nC: %.8lf\n\n", iResA, iResB, iResC);
resA = 0.05 + (0.85 * ((iResB/outLinksB) + (iResC/outLinksC)));
resB = 0.05 + (0.85 * ((iResA/outLinksA) + (iResC/outLinksC)));
resC = 0.05 + (0.85 * ((iResA/outLinksA)));
printf("new values for all PR:\nA: %.8lf\nB: %.8lf\nC: %.8lf\n\n", resA, resB, resC);
for (int i = 0; i < 10; i++) {
resA = 0.05 + (0.85 * ((resB/outLinksB) + (resC/outLinksC)));
resB = 0.05 + (0.85 * ((resA/outLinksA) + (resC/outLinksC)));
resC = 0.05 + (0.85 * ((resA/outLinksA)));
printf("Iteration: %d\nnew values for all PR:\nA: %.8lf\nB: %.8lf\nC: %.8lf\n\n", i + 1, resA, resB, resC);
}
return 0;
}
I have to find initial results to work with, I have set the damping factor (d) to 0.05 ((1-0.85)/3 was used to calculate that, I'm dividing by 3 because that's how many imaginary web pages I'm working with).
The problem is that I will have to create a new variable for every iteration, so this means whatever's inside the "for" loop is technically wrong. resA will be given a new value with each iteration, and that new value will be used to calculate resB, which is not good. I want to be able to use the old value of resA to calculate resB, when the iteration is finished, only then do I want the new value to be used, and that value must remain constant until the next iteration.
Perhaps there is a much easier method, and I am just over-complicating things. I'm sorry if this is really easy and I'm just not seeing a way to create a good implementation. What new things must I learn to make my life easier trying to implement this?

Answer 1

Allocate new variables
Store the result to the new variables during calculation
Store results to the original variables from the new variables after calculation
for (int i = 0; i < 10; i++) {
double new_resA = 0.05 + (0.85 * ((resB/outLinksB) + (resC/outLinksC)));
double new_resB = 0.05 + (0.85 * ((resA/outLinksA) + (resC/outLinksC)));
double new_resC = 0.05 + (0.85 * ((resA/outLinksA)));
resA = new_resA;
resB = new_resB;
resC = new_resC;
printf("Iteration: %d\nnew values for all PR:\nA: %.8lf\nB: %.8lf\nC: %.8lf\n\n", i + 1, resA, resB, resC);
}