confused by C syntax -

i'm new @ c.. , still having trouble @ syntax, hope can me... cause i'm stuck @ code

#include<stdio.h> #include<stdlib.h> #include<string.h>  int main(void){      file *stream = null;      stream = fopen("studentinfo.txt", "a+");      /*some of initialization used testing purposes only*/       char arr[5];      char arr2[5];      int i;      char name[3];      char course[5];       printf("enter details: ");      scanf("%s", arr2);       while(!feof(stream)){          fgets(arr, 100, stream);//i confused if line capture stored @ arr[0]         if(strcmp(arr, arr2)==0){//i want compare            printf("success");//testing         }         printf("%s", arr);//i wonder fgets overwrites new line arr[0]      }       fclose(stream);       getch(); } 

thanks guys...

if have existing file... , file has data on it. check if data typed existing on file or not. i'm not sure if want.

example if typed... love , file contains exact word... love (on 1 line) print "success".

if data typed not existing on file, appended on file (on next line).

int main(void){   char arr[5];  char arr2[5];  int i;  int n=0;   file *stream = null;  file *append = null;  stream = fopen("studentinfo.txt", "rt");  append = fopen("studentinfo.txt", "a+");   printf("enter details: ");  scanf("%s", arr2);   while(!feof(stream)){      fgets(arr, 6, stream);     if(strcmp(arr, arr2)==0){        printf("success");     } else n=-1;    }    if (n==-1){      fprintf(append, "%s\n", arr2);  }  fclose(stream);  fclose(append);  system("pause"); }