This is my c language program. Please help me. It is due in 10 hours.

Your task: Create a program that prints a class roll sheet in alphabetical order. The user inputs the students' first name and last names (separately!), and presses enter on the first name when done. The program prints out the roster like this...

HATFIELD, HEIDI KAISER, RUSSELL LIPSHUTZ, HOWARD PENKERT, DAWN WRIGHT, ELIZABETH

Before starting, carefully study sort_str(), mod_str(), and format(). Make a copy of sort_str() and rename it roll(). Also, change stsrt() to stsrt2(). Compile and make sure it works from main(). Change limit[] to represent first name. The input should work for 30 students and first name should be 15 characters. Change prompts as needed. Compile and test. Make changes to convert the first name to all upper case using a function from mod_str(). Add another array and get input for last name which will also be an array of 30 with 15 characters. Combine last and first into an third array.

The codes below are just for your reference only. If you could do without them, just fine. In case, if you are wondering where to start, the codes below are just the guidelines.

format()

mod_str() program

sort_str()

1 ?* format.c-format a string */ #include #define MAX 20 4 char sgets (char st, int n); void format (void) char first[MAX]; char last[MAX]; char formal[2 MAX 10]; double prize; 10 puts "Enter your first name:") s gets(first, MAX) puts("Enter your last name:"); s gets(last, MAX) puts("Enter your prize money:"); scanf("%lf", &prize); sprintf(formal, "%s, %-19s: S966 . 2f ", puts(formal); 13 14 15 18 19 20 21 last, first, prize); 23 char s gets (char st, int n) 24 25 26 char ret val; inti- 28 29 30 ret val -fgets(st, n, stdin); if (ret val) else // must have words[i]??0' while (getchar 'n') 35 37 38 continue; return ret val; 40 41 1 ?* format.c-format a string */ #include #define MAX 20 4 char sgets (char st, int n); void format (void) char first[MAX]; char last[MAX]; char formal[2 MAX 10]; double prize; 10 puts "Enter your first name:") s gets(first, MAX) puts("Enter your last name:"); s gets(last, MAX) puts("Enter your prize money:"); scanf("%lf", &prize); sprintf(formal, "%s, %-19s: S966 . 2f ", puts(formal); 13 14 15 18 19 20 21 last, first, prize); 23 char s gets (char st, int n) 24 25 26 char ret val; inti- 28 29 30 ret val -fgets(st, n, stdin); if (ret val) else // must have words[i]??0' while (getchar 'n') 35 37 38 continue; return ret val; 40 41