Thread: Strlen

Hello. When i am using i read text from file and when i use strlen function I always getting sting length longer by 1. Is there any alternative way to count string length except -1 because I need to find shortest line in .txt file.

Code:

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

int main()
{
    FILE *fp;
    char filename[50];
    char str[100];
    int a,min=0;
    printf("Enter file name \n");
    scanf("%s",&filename);
    if ((fp=fopen(filename,"r"))==NULL)
    {
        printf("Error \n");
        system("pause");
        exit(1);
    }
  while (!feof(fp))
    {
        fgets(str, 99, fp);
         a=(strlen(str));
         if (a=1)
         if (min=0)
         min=a;
         else
         if (min<a)
         min=a;
   }
    printf ("%d", min);
    system("pause");

}

of course this isn't complete code because i faced this problem.

>A newline character makes fgets stop reading, but it is considered a valid character and therefore it is included in the string copied to str.

in other words, strlen is counting the newline character at the end of each line. since each line has a newline, you can just use the length as is, or subtract 1 if you like. except the last line may not have one, so you might need to check the end of each line whether to subtract 1 or not.