Segmentation fault in getc()

I am developing a linked list in C. And I am getting the data from a txt file. But when I try to run the program, it gives me a segmentation fault of getc() Here's the code,

#include<stdio.h>
#include<stdlib.h>
struct node{
            char surname[100];
        int number[1o0];
        char n开发者_运维问答ame[100];
        struct node *next;
       };
typedef struct node Node;

int main()
{
FILE *ifp;
Node first ,*current;
//current =&first;
int i=0,j=0;
int ch;
char num[100],name[100];

ifp = fopen("tele.txt","r");

 while (ch != EOF)
{       
    while(i<4)
    {
      ch = getc(ifp);
      num[i++] = ch;
    }
    num[i] = '\0'; 
    i=0;
    while(ch !='\n')
    {    
       ch = getc(ifp);
       if(ch != '\t')
         name[j++]=ch;
    }
    name[j] = '\0'; 
    //ch = '\0';

    printf("Number %s\nName %s\n ",num,name);
    j=0;

}

fclose(ifp);
}

and the error I am getting while I try to run the program is,

Program received signal SIGSEGV, Segmentation fault. 0x0000003c0ee68dfa in getc () from /lib64/libc.so.6

Kindly guide me in this. thanks in advance.

The most likely reason is that it can't open the file.

Check that ifp is not NULL immediately after you've called fopen("tele.txt","r"). If it is NULL, errno will give you more detail of what went wrong (lots of possible reasons, some of which are: the file doesn't exist, you don't have permissions to access it, or you're in the wrong directory.)

There are also several issues around ch itself, probably unrelated to the crash:

• ch is not initialized, so the while (ch != EOF) may or may not be entered [thanks to @Dirk for pointing this out];
• while(ch !='\n') is a bit dodgy in that if you encouter EOF, you end up in an infinite loop.