C Read File Line by Line Into Array

C program to read numbers from a file and store them in an array:

In this post, nosotros will learn how to read numbers from a text file and store them in an array in C. One text file is given and this file holds dissimilar number values. The C plan volition read all these values from that file and put them in an assortment. Likewise, information technology will print the assortment content.

Create the text file:

For this case, create one file testfile.txt with the below text:

C Program:

Below C program will read the numbers from the above text file and put them in an array. Create one instance.c file in the same folder of testfile.txt with the below lawmaking:

                                          #                include                <stdio.h>                            int              chief              (              void              )              {              int              numbers[              fifty              ]              ;              int              i              =              0              ;              FILE              *file;              if              (file              =              fopen              (              "testfile.txt"              ,              "r"              )              )              {              while              (              fscanf              (file,              "%d"              ,              &numbers[i]              )              !=              EOF              )              {              i++              ;              }              fclose              (file)              ;              numbers[i]              =              '\0'              ;              for              (i              =              0              ;              numbers[i]              !=              '\0'              ;              i++              )              printf              (              "%d\n"              ,              numbers[i]              )              ;              }              render              0              ;              }                      

Hither,

• numbers is an array to concord the numbers
• file is the file pointer. This file pointer is used to hold the file reference once it is open.
• Using fopen, we are opening the file in read more than. The r is used for read manner. If the file is opened using fopen, information technology scans the content of the file.
• The while loop reads the file and puts the content i.e. the numbers in the numbers array. The i is used to indicate to the electric current location in the array. Information technology starts from 0 and information technology is incremented by 1 on each iteration.
• Once the while loop ends, nosotros are endmost the file using fclose. Also, as the reading is completed, we are adding \0 at the finish of the array.
• The final for loop is used to print the contents of the numbers assortment, i.e. the numbers of the text file.

Output:

Information technology volition impress the contents of the file, i.due east. the numbers.

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Source: https://www.codevscolor.com/c-read-numbers-file-store-array

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