#include <stdio.h>
#include <stdlib.h>
void f (char, float, float, float *, float *);

float cpwr (float, float);

void srt (float[][4], int);

int
main ()
{

char kind;

int i = 0, j, n = 0;

float x[100][4], res, vol, ia, pwr, am, sm = 0, avg;

FILE * in;

in = fopen ("Electric.txt", "r");

while (fscanf (in, " %c%f%f", &kind, &am, &ia) != EOF)

    {

f (kind, am, ia, &res, &vol);

pwr = cpwr (vol, ia);

n++;

x[i][0] = pwr;

x[i][1] = ia;

x[i][2] = vol;

x[i][3] = res;

sm += x[i][0];

i++;

}

srt (x, n);

avg = sm / n;

printf ("Average pwr=%4.4f\n", avg);

for (i = 0; i < n; i++)

    {

printf ("Device#%d\tp=%4.4f\tia=%4.4f\tVolt=%4.4f\tResistance=%4.4f\n",
           i + 1, x[i][0], x[i][1], x[i][2], x[i][3]);

}

fclose (in);

return 0;

}


float
cpwr (float v, float c)
{

float pwr;

pwr = v * c;

return pwr;

}


void
srt (float p[][4], int s)
{

int i, j, k;

float temp;

for (i = 0; i < s; i++)

    {

for (j = i + 1; j < s; j++)

    {

if (p[i][0] > p[j][0])

        {

for (k = 0; k < 4; k++)

        {

temp = p[i][k];

p[i][k] = p[j][k];

p[j][k] = temp;

}

}

}

}


}


void
f (char x, float y, float z, float *r, float *v)
{

switch (x)

    {

case 'V':

*r = y / z;

*v = y;

break;

case 'R':

*v = y * z;

*r = y;

break;

}

}