CODEWITHSUNDEEP
c
babySteps
babySteps

Reputation: 39

how to print multiple max values using loop

Trying to calculate at which frequencies voltage hits max, i am able to print the most recent max but there may be lower values of frequency in which it is able to max voltage.

I am able to get the highest or lowest freq by switching the loop from + to - from or to 1000000 in increments of 10.

Tried nested if statement inside of VO > voMax

#include <stdio.h>
#include <conio.h>
#include <math.h>
#define PI 3.14f
#define Vi 5

#define L 4.3e-4
#define C 5.1e-6

int getFreq();
long getResist();
float getVO(float XL, float XC, int R);
float getXC(int f);
float getXL(int f);

int main()
{
    long resist, freq, fMax;
    float XL, XC, VO, voMax;

    voMax = 0;
    fMax = 0;
    resist = getResist();
    for (freq = 1000000; freq >= 0; freq -= 10)
    {
        XL = getXL(freq);

        XC = getXC(freq);

        VO = getVO(XL, XC, resist);
        if (1000000 == freq)
        {
            fMax = freq;
            voMax = VO;

        }
        else if (VO > voMax)
        {
            fMax = freq;
            voMax = VO;

        }       
    }
    printf("VO = %f Frequency = %d\n", voMax, fMax);
    getch();
    return 0;
}

float getXL(long f)
{
    float XL;

    XL = 2 * PI * f * C;
    return XL;
}

float getXC(long f)
{
    float XC;

    XC = 1 / (2 * PI * f * C);
    return XC;

}

float getVO(float XL, float XC, long R)
{
    float VO;

    VO = (Vi * R) / sqrt((XL - XC) * (XL - XC) + R * R);
    return VO;
}

int getFreq()
{
    int freq;
    freq = 0;
    printf("please enter a frequency:");
    scanf("%d", &freq);
    return freq;
}
long getResist()
{
    int resist;
    resist = 0;
    printf("please enter a resistance:");
    scanf("%d", &resist);
    return resist;
}

I want the voltage to print max at multiple freq.

Upvotes: 1

Views: 197

Answers (1)

virolino
virolino

Reputation: 2227

Well, what you want is to generate "a lot" of data, and then make some analysis. I would actually implement it in two steps:

  1. Generate the data (and save it in an array or in a file)
  2. Do any analysis you need on that data.

After you get the desired result with this clear approach, you can move to the next step and try to optimize the algorithm, according to any optimization rule you need.

I want the voltage to print max at multiple freq.

I think you need a small code update. You have the following sequence:

voMax = 0;
fMax = 0;
resist = getResist();
for (freq = 1000000; freq >= 0; freq -= 10)
{

you should probably have:

fMax = 0;
resist = getResist();
for (freq = 1000000; freq >= 0; freq -= 10)
{
    voMax = 0;

(I moved "voMax = 0;" inside the "for").

In that way, you can calculate max voltages for all frequencies, without interference from the other frequencies.

Upvotes: 2

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