Hi All,
Can any one help me with the code how to read a text file and to save the contents of the file in a structure.
My text file contains phone book directory with firstname, last name and phone number. Below is the format of my phone book.
Ben John, 6212445732
Ben Jessey, 852144521255
can any one help me with a code ?
Break everything into smaller, more manageable functions. Here are my suggestions:
Code:#include <stdint.h> struct Phone { char* firstName; char* lastName; uint64_t number; }; // Reads new phone book directory and saves it into "*ptr". Returns false if there are no more entries bool readPhone(struct Phone* ptr, FILE* fptr); // --- IN MAIN --- struct Phone* book = NULL; // This holds all the structs struct Phone temp; // Temporary for reading while (readPhone(&temp, fptr)) { // Expand book by means of realloc // Assign temp to the last(not-used) index of the realloced array } // Profit! // Loop through all of them and call free for firstName and lastName. If you want, you could define a function to do that for you.
Devoted my life to programming...
We are not here to write code for the OP, but to guide them, and comment on the code the OP writes.
Phone numbers are better stored as text rather than as an unsigned integer.
To be fair, GReaper just posted some "guide" code snippets for the OP - though I suspect layers of memory allocation might be beyond the skill level of the OP. Fixed sized arrays might be more appropriate for purposes of this exercise.Originally Posted by rstanley
Agreed.
I agree with this, but I thought that for a newcomer it'd be easier to have scanf do the testing, instead of having to check the string themselves for inappropriate characters.
Devoted my life to programming...
The OP is obviously new to C. Best for the OP to learn reading and separating the data into a struct first, and deal with validation later.
I would recommend reading in the line using fgets() then breaking up the line with either sscanf() or strtok().
