Read a Text File of Numbers Into Array C#

C Exercises: Read the file and store the lines into an array

Last update on Dec xviii 2022 12:00:58 (UTC/GMT +8 hours)

C File Treatment : Exercise-4 with Solution

Write a plan in C to read the file and store the lines into an array.

Sample Solution:

C Lawmaking:

            #include <stdio.h> #include <stdlib.h> #include <string.h>  #define LSIZ 128  #define RSIZ 10   int main(void)  {     char line[RSIZ][LSIZ]; 	char fname[20];     FILE *fptr = NULL;      int i = 0;     int tot = 0;     printf("\n\northward Read the file and shop the lines into an array :\n"); 	printf("------------------------------------------------------\n");  	printf(" Input the filename to exist opened : "); 	scanf("%s",fname);	      fptr = fopen(fname, "r");     while(fgets(line[i], LSIZ, fptr))  	{         line[i][strlen(line[i]) - 1] = '\0';         i++;     }     tot = i; 	printf("\due north The content of the file %due south  are : \north",fname);         for(i = 0; i < tot; ++i)     {         printf(" %s\n", line[i]);     }     printf("\due north");     render 0; }                      

Sample Output:

            Read the file and store the lines into an assortment :                                                             ------------------------------------------------------                                                          Input the filename to be opened : test.txt                                                                                                                                                                                    The content of the file test.txt  are :                                                                                                                                                                                       test line ane                                                                                                    test line two                                                                                                    exam line 3                                                                                                    test line 4          

Flowchart:

C Programming Lawmaking Editor:

Have another mode to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a program in C to write multiple lines in a text file.
Next: Write a program in C to Find the Number of Lines in a Text File.

What is the difficulty level of this exercise?

Exam your Programming skills with w3resource'south quiz.



C Programming: Tips of the Day

C Programming - What is the difference betwixt const int*, const int * const, and int const *?

Read information technology backwards (equally driven by Clockwise/Spiral Dominion):

• int* - pointer to int
• int const * - pointer to const int
• int * const - const pointer to int
• int const * const - const pointer to const int

Now the beginning const can be on either side of the type and so:

• const int * == int const *
• const int * const == int const * const

If you want to get really crazy you tin can do things like this:

• int ** - pointer to pointer to int
• int ** const - a const arrow to a pointer to an int
• int * const * - a pointer to a const pointer to an int
• int const ** - a arrow to a arrow to a const int
• int * const * const - a const pointer to a const pointer to an int
• ...

And to make sure we are clear on the pregnant of const:

int a = 5, b = ten, c = 15;  const int* foo;     // pointer to constant int. foo = &a;           // assignment to where foo points to.  /* dummy argument*/ *foo = 6;           // the value of a tin can't get changed through the pointer.  foo = &b;           // the pointer foo can be changed.    int *const bar = &c;  // constant arrow to int                        // note, y'all actually need to set the arrow                        // here considering you lot can't change it later ;)  *bar = 16;            // the value of c can be changed through the arrow.      /* dummy argument*/ bar = &a;             // non possible because bar is a constant pointer.          

foo is a variable pointer to a abiding integer. This lets you lot change what you point to but not the value that you lot indicate to. About often this is seen with C-mode strings where y'all have a pointer to a const char. You may modify which string you point to only you tin't change the content of these strings. This is important when the cord itself is in the data segment of a program and shouldn't exist changed.
bar is a constant or fixed pointer to a value that tin can be changed. This is like a reference without the extra syntactic saccharide. Because of this fact, usually you would use a reference where you would utilize a T* const arrow unless you need to allow Zippo pointers.

Ref : https://bit.ly/39RctBb

---

• New Content published on w3resource:
• HTML-CSS Practical: Exercises, Practise, Solution
• Java Regular Expression: Exercises, Practise, Solution
• Scala Programming Exercises, Practise, Solution
• Python Itertools exercises
• Python Numpy exercises
• Python GeoPy Parcel exercises
• Python Pandas exercises
• Python nltk exercises
• Python BeautifulSoup exercises
• Form Template
• Composer - PHP Packet Managing director
• PHPUnit - PHP Testing
• Laravel - PHP Framework
• Angular - JavaScript Framework
• Vue - JavaScript Framework
• Jest - JavaScript Testing Framework

---

---

persaudcrist1978.blogspot.com

Source: https://www.w3resource.com/c-programming-exercises/file-handling/c-file-handling-exercise-4.php

Share this post