Step by Step solution about How to resolve the algorithm Write float arrays to a text file step by step in the C programming language

The provided C code performs the following tasks:

1. Data Initialization:

   • It initializes an array x of size 4 with floating-point values. These values are: 1, 2, 3, and 1e11 (scientific notation for 10 raised to the power of 11).
   • It initializes another array y of size 4 to hold the square roots of the elements in x.

2. File Opening:

   • It opens a file named "floatArray" in write mode using fopen. This file will store the square roots of the numbers in array x.

3. Calculating and Writing to File:

   • It enters a loop that iterates through the elements of x.
   • For each element in x, it calculates the square root and stores the result in the corresponding element of y.
   • It writes the values from x and y to the open file with formatting to specify the desired number of decimal places.
   • Specifically, it uses the following format string: "%.3g\t%.5g\n"
     • "%.3g" is used to write the value of x and specifies that it should use scientific notation if necessary and display up to 3 significant digits.
     • "%.5g" is used to write the value of y and specifies that it should use scientific notation if necessary and display up to 5 significant digits.
     • "\t" is a tab character used to separate the two values.
     • "\n" represents a newline character.

4. Loop Completion and File Closing:

   • After processing all elements of x, it closes the file using fclose.

5. Output:

   • The resulting file "floatArray" will contain the following lines:

   1       1
   2       1.4142
   3       1.7321
   1e+11   3.1623e+05
   

   These lines show the original numbers in x and their corresponding square roots in y, formatted as specified by the format string.

#include <stdio.h>
#include <math.h>

int main(int argc, char **argv) {

   float x[4] = {1,2,3,1e11}, y[4];
   int i = 0;
   FILE *filePtr;

   filePtr = fopen("floatArray","w");

   for (i = 0; i < 4; i++) {
      y[i] = sqrt(x[i]);
      fprintf(filePtr, "%.3g\t%.5g\n", x[i], y[i]);
   }

   return 0;
}


1       1
2       1.4142
3       1.7321
1e+11   3.1623e+05