Question: Write a function called clockKeeper that takes as its argument a dateAndTime structure. THe function should call the timeUpdate function, and if the time reaches midnight, the function should call the dateUpdate function to switch over to the next day. Have the function return the updated dateAndTime structure.
My attempt: please see the attached file.
Any help is much appreciated.
my attempt: (but the compiler is showing many errors which i couldn't seem to figure out)
Code:#include <stdio.h> struct dateAndTime clockKeeper (struct dateAndTime dt) { struct time timeUpdate (struct time now); struct date dateUpdate (struct date today); dt.stime = timeUpdate (dt.stime); if ( dt.stime.hour == 0 && dt.stime.minutes == 0 && dt.stime.seconds == 0 ) dt.sdate = dateUpdate (dt.sdate); return dt; } int main (void) { struct dateAndTime dt1 = { { 12, 31, 2004 }, { 23, 59, 59 } }; struct dateAndTime dt2 = { { 2, 28, 2008 }, { 23, 59, 58 } }; printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n", dt1.sdate.month, dt1.sdate.day, dt1.sdate.year, dt1.stime.hour, dt1.stime.minutes, dt1.stime.seconds); dt1 = clockKeeper (dt1); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n", dt1.sdate.month, dt1.sdate.day, dt1.sdate.year, dt1.stime.hour, dt1.stime.minutes, dt1.stime.seconds); printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n" dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); dt2 = clockKeeper (dt2); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n", dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n", dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); dt2 = clockKeeper (dt2); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n" dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); return 0; }
Last edited by cougarsmustangs; 03-23-2013 at 10:41 PM.
It helps if you post them.Originally Posted by cougarsmustangs
Where did you write your structure declarations? Most of the rest are here because you didn't actually declare or include the structure types in this file.Code:mingw32-gcc.exe -Wall -g -pedantic -Wextra -Wall -ansi -g -c C:\Users\Josh2\Documents\sandboxc\main.c -o obj\Debug\main.o C:\Users\Josh2\Documents\sandboxc\main.c:6:54: error: parameter 1 ('dt') has incomplete type C:\Users\Josh2\Documents\sandboxc\main.c:6:21: error: return type is an incomplete type C:\Users\Josh2\Documents\sandboxc\main.c: In function 'clockKeeper': C:\Users\Josh2\Documents\sandboxc\main.c:12:3: error: type of formal parameter 1 is incomplete C:\Users\Josh2\Documents\sandboxc\main.c:17:5: error: type of formal parameter 1 is incomplete C:\Users\Josh2\Documents\sandboxc\main.c:20:3: warning: 'return' with a value, in function returning void [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:6:54: warning: unused parameter 'dt' [-Wunused-parameter] C:\Users\Josh2\Documents\sandboxc\main.c: In function 'main': C:\Users\Josh2\Documents\sandboxc\main.c:28:10: error: variable 'dt1' has initializer but incomplete type C:\Users\Josh2\Documents\sandboxc\main.c:28:10: error: extra brace group at end of initializer C:\Users\Josh2\Documents\sandboxc\main.c:28:10: error: (near initialization for 'dt1') C:\Users\Josh2\Documents\sandboxc\main.c:28:10: warning: excess elements in struct initializer [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:28:10: warning: (near initialization for 'dt1') [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:28:10: error: extra brace group at end of initializer C:\Users\Josh2\Documents\sandboxc\main.c:28:10: error: (near initialization for 'dt1') C:\Users\Josh2\Documents\sandboxc\main.c:28:10: warning: excess elements in struct initializer [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:28:10: warning: (near initialization for 'dt1') [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:28:23: error: storage size of 'dt1' isn't known C:\Users\Josh2\Documents\sandboxc\main.c:29:10: error: variable 'dt2' has initializer but incomplete type C:\Users\Josh2\Documents\sandboxc\main.c:29:10: error: extra brace group at end of initializer C:\Users\Josh2\Documents\sandboxc\main.c:29:10: error: (near initialization for 'dt2') C:\Users\Josh2\Documents\sandboxc\main.c:29:10: warning: excess elements in struct initializer [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:29:10: warning: (near initialization for 'dt2') [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:29:10: error: extra brace group at end of initializer C:\Users\Josh2\Documents\sandboxc\main.c:29:10: error: (near initialization for 'dt2') C:\Users\Josh2\Documents\sandboxc\main.c:29:10: warning: excess elements in struct initializer [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:29:10: warning: (near initialization for 'dt2') [enabled by default] C:\Users\Josh2\Documents\sandboxc\main.c:29:23: error: storage size of 'dt2' isn't known C:\Users\Josh2\Documents\sandboxc\main.c:49:11: error: expected ')' before 'dt2' C:\Users\Josh2\Documents\sandboxc\main.c:73:11: error: expected ')' before 'dt2' C:\Users\Josh2\Documents\sandboxc\main.c:29:23: warning: unused variable 'dt2' [-Wunused-variable] C:\Users\Josh2\Documents\sandboxc\main.c:28:23: warning: unused variable 'dt1' [-Wunused-variable] Process terminated with status 1 (0 minutes, 0 seconds) 18 errors, 12 warnings (0 minutes, 0 seconds)
how about now?
Code:#include <stdio.h> struct date { int month; int day; int year; }; struct time { int seconds; int minutes; int hour; }; struct dateAndTime clockKeeper (struct dateAndTime dt) { struct time timeUpdate (struct time now); struct date dateUpdate (struct date today); dt.stime = timeUpdate (dt.stime); if ( dt.stime.hour == 0 && dt.stime.minutes == 0 && dt.stime.seconds == 0 ) dt.sdate = dateUpdate (dt.sdate); return dt; } int main (void) { struct dateAndTime dt1 = { { 12, 31, 2004 }, { 23, 59, 59 } }; struct dateAndTime dt2 = { { 2, 28, 2008 }, { 23, 59, 58 } }; printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n", dt1.sdate.month, dt1.sdate.day, dt1.sdate.year, dt1.stime.hour, dt1.stime.minutes, dt1.stime.seconds); dt1 = clockKeeper (dt1); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n", dt1.sdate.month, dt1.sdate.day, dt1.sdate.year, dt1.stime.hour, dt1.stime.minutes, dt1.stime.seconds); printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n" dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); dt2 = clockKeeper (dt2); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n", dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n", dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); dt2 = clockKeeper (dt2); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n" dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); return 0; }
I compiled it and its still showing errors:
Code:$ vim ex9.5.c $ gcc ex9.5.c ex9.5.c:17:53: error: parameter 1 ('dt') has incomplete type ex9.5.c:17:21: error: return type is an incomplete type ex9.5.c: In function 'clockKeeper': ex9.5.c:28:5: warning: 'return' with a value, in function returning void [enable d by default] ex9.5.c: In function 'main': ex9.5.c:33:12: error: variable 'dt1' has initializer but incomplete type ex9.5.c:33:12: error: extra brace group at end of initializer ex9.5.c:33:12: error: (near initialization for 'dt1') ex9.5.c:33:12: warning: excess elements in struct initializer [enabled by defaul t] ex9.5.c:33:12: warning: (near initialization for 'dt1') [enabled by default] ex9.5.c:33:12: error: extra brace group at end of initializer ex9.5.c:33:12: error: (near initialization for 'dt1') ex9.5.c:33:12: warning: excess elements in struct initializer [enabled by defaul t] ex9.5.c:33:12: warning: (near initialization for 'dt1') [enabled by default] ex9.5.c:33:25: error: storage size of 'dt1' isn't known ex9.5.c:34:12: error: variable 'dt2' has initializer but incomplete type ex9.5.c:34:12: error: extra brace group at end of initializer ex9.5.c:34:12: error: (near initialization for 'dt2') ex9.5.c:34:12: warning: excess elements in struct initializer [enabled by defaul t] ex9.5.c:34:12: warning: (near initialization for 'dt2') [enabled by default] ex9.5.c:34:12: error: extra brace group at end of initializer ex9.5.c:34:12: error: (near initialization for 'dt2') ex9.5.c:34:12: warning: excess elements in struct initializer [enabled by defaul t] ex9.5.c:34:12: warning: (near initialization for 'dt2') [enabled by default] ex9.5.c:34:25: error: storage size of 'dt2' isn't known ex9.5.c:37:6: error: invalid operands to binary % (have 'char *' and 'complex do uble') ex9.5.c:37:10: error: expected ')' before ':' token ex9.5.c:37:10: error: stray '\' in program ex9.5.c:37:22: warning: missing terminating " character [enabled by default] ex9.5.c:37:10: error: missing terminating " character ex9.5.c:51:6: error: expected ')' before 'dt2' ex9.5.c:70:6: error: expected ')' before 'dt2'
Better, but still missing type declarations.
ex9.5.c:17:53: error: parameter 1 ('dt') has incomplete type
Notice the type of dt
Notice that type declaration is missing.
Thus everything that depends on that declaration is "wrong".
If you still have compiler errors after correcting that, then they should be easy to figure out.
am i on the right track? I compiled this and its still showing pretty much the same errors
Code:#include <stdio.h> int dt; struct date { int day; int month; int year; }; struct time { int seconds; int minutes; int hour; }; struct dateAndTime clockKeeper (struct dateAndTime dt) { struct time timeUpdate (struct time now); struct date dateUpdate (struct date today); dt.stime = timeUpdate (dt.stime); if ( dt.stime.hour == 0 && dt.stime.minutes == 0 && dt.stime.seconds == 0 ) dt.sdate = dateUpdate (dt.sdate); return dt; } int main (void) int dt1; int dt2; { struct dateAndTime dt1 = { { 12, 31, 2004 }, { 23, 59, 59 } }; struct dateAndTime dt2 = { { 2, 28, 2008 }, { 23, 59, 58 } }; printf ("Current date and time is %.2i/%.2i/%.2i " %.2i:%.2i:%.2i\n", dt1.sdate.month, dt1.sdate.day, dt1.sdate.year, dt1.stime.hour, dt1.stime.minutes, dt1.stime.seconds); dt1 = clockKeeper (dt1); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n", dt1.sdate.month, dt1.sdate.day, dt1.sdate.year, dt1.stime.hour, dt1.stime.minutes, dt1.stime.seconds); printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n" dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); dt2 = clockKeeper (dt2); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n", dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); printf ("Current date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n", dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); dt2 = clockKeeper (dt2); printf ("Updated date and time is %.2i/%.2i/%.2i " "%.2i:%.2i:%.2i\n\n" dt2.sdate.month, dt2.sdate.day, dt2.sdate.year, dt2.stime.hour, dt2.stime.minutes, dt2.stime.seconds); return 0; }
Oh oh me me me - I knows teh answers to this one -> Struct Problem Please help - Dev Shed
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
