Question

How to read (input) a line from a text file and display it in C

Answer 1

#include <stdio.h> 
#include <stdlib.h> 

int main(void)
{   
    FILE *fp;
    char s[256];;
  
    fp = fopen ("d://data.txt", "r"); // r - read from file
    if (fp == NULL) 
        perror ("Error open file");
    else
    {
        if (fgets (s , 256 , fp) != NULL)
            puts(s);
         
        fclose(fp);
    }
            
    return 0;
}

  
/*
run:

I like programming

*/

 

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Answer 2

#include <stdio.h> 
#include <stdlib.h> 

int main(void)
{   
    char s[100];
    FILE *fp;

    if ((fp = fopen("d:\\data.txt", "r")) == NULL)
    {
        printf("Error Open File");
        exit(1);         
    }

    fscanf(fp, "%[^\n]", s);

    printf("%s", s);
    
    fclose(fp);
            
    return 0;
}

  
/*
run:

I like programming

*/

 

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Answer 3

#include <stdio.h> 
#include <stdlib.h> 

int main(void)
{   
    char s[100];
    FILE *fp;
 
    if ((fp = fopen("d:\\data.txt", "r")) == NULL)
    {
        printf("Error Open File");
        return -1;    
    }
 
    if (fgets (s, 100, fp) != NULL) 
        puts(s);
     
    fclose(fp);
            
    return 0;
}

  
/*
run:

I like programming

*/

 

70+ SQL courses for beginners and professionals