How to fix "syntax error before numeric constant " error message?

[lingjun]

Hi,
I am taking my first programing course in college... and I am completely lost on this assignment. I am not sure what is wrong with my current code. Any help will be appreciate it... thanks!

I keep on getting the follow error messages when I try to compile it.

test.c:3: error: syntax error before numeric constant
test.c: In function `main':
test.c:18: error: `next_day' undeclared (first use in this function)
test.c:18: error: (Each undeclared identifier is reported only once
test.c:18: error: for each function it appears in.)
test.c: In function `find_next_day':
test.c:25: error: parameter name omitted
test.c:29: error: syntax error before "day"
test.c:32: error: break statement not within loop or switch
test.c:33: error: case label not within a switch statement
....
test.c:53: error: syntax error before "return"

My code is the following:

 
 #include <stdio.h>
 
enum day {sun=1, mon, tue, wed, thur, fri, sat};
 
typedef enum day day;
 
day find_next_day (day);
 
int main(void)
{
    day x, next_day;
 
    printf("\nEnter a day. ");
    scanf("%d", &x);
 
    find_next_day (x);
 
    printf ("%d", next_day);
 
    return 0;
}
 
 
 
day find_next_day (day)
{    
    day next_day;
 
    switch (day) {
    case sun:
        next_day = mon;
        break;
    case mon:
        next_day = tue;
        break;
    case tue:
        next_day = sun;
        break; 
    case wed:
        next_day = thur;
        break;
    case thur:
        next_day = fri;
        break;
    case fri:
        next_day = sat;
        break; 
    case sat:
        next_day = sun;
        break;
    }
 
    return next_day;
 
}
 
 

Any help will be appreciated! Thanks.

[Banfa]

You didn't get those errors from the code you posted so I suggest you either post the errors that match the code or post the code that matches the errors.

[lingjun]

Sorry. I rewrote the code with some changes. Now the only error message I am getting is:

testing.c:4: error: syntax error before numeric constant


My code is:

#include <stdio.h>
 
 
enum day {sun, mon, tue, wed, thur, fri, sat};
 
 
typedef enum day Day;
 
 
Day find_next_day (Day day);
 
int main(void)
{
   int error;
   Day x, next_day;
 
    do {
         printf("\n Please enter an integer for the starting day.  ");
         scanf("%d", &x);
         if (error = ( x> 6 || x < 0))
             printf ("\n ERROR: The value must be within the range of 0 to 6.");
         } while (error);
/*The above should make sure the user enters a legit value*/
 
   next_day = find_next_day (x);
 
   printf ("%d", next_day);
 
   return 0;
}
 
 
 
Day find_next_day (Day day) 
/* I tried to take out the Switch and simplify it...*/
{
 
    return ((Day) (((int) day +1) %7));
 
}
 
 

[donbock]

Lines 10, 34, and 38 use "day" as a variable, but that name has already been declared as an enum name on line 4.

Your error message points at line 4. I don't see anything wrong with that line.