I need to create a sorting program with C from a txt file. I need to use bubble sorting and insertion sorting. All I have right now is what the professor gave us to start. I don't know where to go from here! Please help!
Program so far:

#include <stdio.h>
#include <time.h>

int main (void) {

    int start, stop, i=0;

    start=time(0); //start time

    stop=time(0); //stop time

    printf("Elapse time = %d\n" , stop-start); //gets the ending result

First thing is to be able to read the data in the file. To do that, you need to know the way the data is organized, in the file.

Run through a C tutorial on opening files, and reading from them, into an array of some kind - the kind depends on the data. While you're searching for tutorials in C, go to Wikipedia, and read up on Bubble sort and Insertion sort. Wiki has every major sort fully described.