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

Last update on March 20 2025 12:32:32 (UTC/GMT +8 hours)

4. Read File to Array

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

Sample Solution:

C Code:

#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\n Read the file and store the lines into an array :\n");
	printf("------------------------------------------------------\n"); 
	printf(" Input the filename to be 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("\n The content of the file %s  are : \n",fname);    
    for(i = 0; i < tot; ++i)
    {
        printf(" %s\n", line[i]);
    }
    printf("\n");
    return 0;
}

Sample Output:

 Read the file and store the lines into an array :                                                            
------------------------------------------------------                                                        
 Input the filename to be opened : test.txt                                                                   
                                                                                                              
 The content of the file test.txt  are :                                                                      
                                                                                                              
 test line 1                                                                                                  
 test line 2                                                                                                  
 test line 3                                                                                                  
 test line 4

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to read a file line by line and store each line in a dynamically allocated array of strings.
Write a C program to load file content into an array and then allow the user to search for a line by its index.
Write a C program to read a file and reverse the order of lines stored in an array before printing them.
Write a C program to read a file into an array, then sort the lines alphabetically and display the sorted output.

C Programming Code Editor:

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