reading characters

 #include<stdio.h>

int main()

{

FILE *ptr;

char c;

ptr=fopen("ab.txt","r");

fscanf(ptr,"%c",&c);

printf("%c",c);

fscanf(ptr,"%c",&c);

printf("%c",c);

fscanf(ptr,"%c",&c);

printf("%c",c);

fscanf(ptr,"%c",&c);

printf("%c",c);

fclose(ptr);

return 0;

}