Q4: a- suppose that the file (delta.txt) shown in the figure was stored in the default path, this file contains three resistors (a, b, and c separated by tabs) for unknown number of delta networks. Write a program to open this file for reading and then use a function that receives as parameter a file stream object of the file (delta.txt) and uses its information to create a new file named (star.txt); the new file is used to store the resistors (P, Q and R) after converting delta networks to star networks using the following formulas: АВ АС ВС P = A+B +C Q = A+ B+C R = A+ B +C delta.txt - Notepad File Edit Format View Help 10 20 30 20 30 40 30 10 50 20 60 50 50 10 30
Q4: a- suppose that the file (delta.txt) shown in the figure was stored in the default path, this file contains three resistors (a, b, and c separated by tabs) for unknown number of delta networks. Write a program to open this file for reading and then use a function that receives as parameter a file stream object of the file (delta.txt) and uses its information to create a new file named (star.txt); the new file is used to store the resistors (P, Q and R) after converting delta networks to star networks using the following formulas: АВ АС ВС P = A+B +C Q = A+ B+C R = A+ B +C delta.txt - Notepad File Edit Format View Help 10 20 30 20 30 40 30 10 50 20 60 50 50 10 30
Computer Networking: A Top-Down Approach (7th Edition)
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Publisher:James Kurose, Keith Ross
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Transcribed Image Text:Q4: a- suppose that the file (delta.txt) shown in the figure was stored in the default path, this file contains
three resistors (a, b, and c separated by tabs) for unknown number of delta networks. Write a program to
open this file for reading and then use a function that receives as parameter a file stream object of the file
(delta.txt) and uses its information to create a new file named (star.txt); the new file is used to store the
resistors (P, Q and R) after converting delta networks to star networks using the following formulas:
AB
P =-
A+B+C
AC
ВС
Q =
A+ B+C
R =
A + B +C
delta.txt - Notepad
File Edit Format View Help
10
20
30
20
30
40
30
10
50
20
60
50
50
10
30
Expert Solution
Step 1
The delta.txt file should contain value separated by spaces. Last values in each row show also have a space.
Example :
10<space>20<space>30<space><new line>
20<space>30<space>40<space><new line>
The code to implement the given requirements is as follows (comments are mentioned for better understanding of the code):
#include <iostream>
#include <fstream>
#include <string>
#include <cstring>
using namespace std;
//Code to split the string using spaces
int *split(string resistor)
{
int *num = new int[3];
int k = 0;
string temp = "";
for (int i = 0; i < resistor.size(); i++)
{
if (resistor[i] != ' ')
{
//Adding each character till space is found
temp += resistor[i];
}
else
{
//Converting from string type to char *
char t[temp.size()];
strcpy(t, temp.c_str());
//Converting from char * to integer and storing in the array
sscanf(t, "%d", &num[k++]);
temp = "";
}
}
//Returning the array containing the resistor values
return num;
}
int main()
{
fstream delta;
//Opening the delta file to read
delta.open("delta.txt", ios::in);
int *num;
int a, b, c, k = 0;
float p, q, r;
string temp = "";
string output = "";
if (delta.is_open())
{
string resistor;
//Reading each line from the file
while (getline(delta, resistor))
{
//Calling the split method to split the resistor values
num = split(resistor);
a = num[0];
b = num[1];
c = num[2];
//Calculating the values of p, q and r
p = (a * b) / (a + b + c);
q = (a * c) / (a + b + c);
r = (b * c) / (a + b + c);
//Adding the result to the output string
output += to_string(p) + " " + to_string(q) + " " + to_string(r) + "\n";
}
}
delta.close();
//Opening the star file to write
ofstream star;
star.open("star.txt", ios::out);
//Printing the result to the output file
star << output;
star.close();
return 0;
}
Step by step
Solved in 2 steps with 1 images
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