Question

How to find all lines containing a word in a text file in C

Answer 1

#include <stdio.h>
#include <string.h>
 
int main(void)
{
    FILE *fp;
    char buffer[255], word[20] = "Programming";
  
    fp = fopen("d:\\test.txt","r");
    if (!fp) return 1;
  
    while (fgets(buffer, 255, fp) != NULL)
    {
           if (strstr(buffer, word) != NULL)
           {
               puts(buffer);
           }
    }
 
    fclose(fp);
     
    return 0;
}
 
/*
 
run:
 
C Programming is Great

You can use C Programming to Develop Everything Games, Communication, Databases and Operation Systems
 
*/

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