Difference between revisions of "Workshop 2"
| (3 intermediate revisions by 2 users not shown) | |||
| Line 3: | Line 3: | ||
'''Submitted by:''' Shayan Vaghei & Mohamed Baig Team#4<br><br> | '''Submitted by:''' Shayan Vaghei & Mohamed Baig Team#4<br><br> | ||
| − | '''Q:'''Unsigned long longs are the same size as doubles. Currently, unsigned long longs are swapping just fine after being cast as doubles, but I was wondering if we were supposed to differentiate between the two. If so, how can you do it when the only argument is size?<br> | + | '''Q:''' Unsigned long longs are the same size as doubles. Currently, unsigned long longs are swapping just fine after being cast as doubles, but I was wondering if we were supposed to differentiate between the two. If so, how can you do it when the only argument is size?<br> |
| + | '''A:''' I was trying to do this with a case for each data type, but we're supposed to cast the void* pointers as char*, and then swap the values byte-by-byte.<br> | ||
'''Submitted by:''' Kevin Kofler, Team 9<br><br> | '''Submitted by:''' Kevin Kofler, Team 9<br><br> | ||
| + | |||
| + | '''Q:''' How to determine the size of a structure?<br /> | ||
| + | '''A:''' Same as primitive types, use sizeof().<br /> | ||
| + | BUT - if there are pointers pointing to, say, strings, sizeof() will only count the sizes of these pointers (which is platform dependent, 4 bytes/pointer on Matrix). The actual size of these strings won't be counted. <br /> | ||
| + | '''Submitted by:''' Yiqi, Team 5<br /><br /> | ||
| + | |||
| + | '''Q:''' When we are swapping structs, and lets say we have two instances of structs, so do we just swap struct1.int1 with struct2.int2? etc..<br /> | ||
Latest revision as of 15:40, 23 September 2013
Q:Is the output for workshop 2 still suppose to be time or something else?
A:No, it is supposed to just swap the values of each variables passed to swap function and display them in the main function.
Submitted by: Shayan Vaghei & Mohamed Baig Team#4
Q: Unsigned long longs are the same size as doubles. Currently, unsigned long longs are swapping just fine after being cast as doubles, but I was wondering if we were supposed to differentiate between the two. If so, how can you do it when the only argument is size?
A: I was trying to do this with a case for each data type, but we're supposed to cast the void* pointers as char*, and then swap the values byte-by-byte.
Submitted by: Kevin Kofler, Team 9
Q: How to determine the size of a structure?
A: Same as primitive types, use sizeof().
BUT - if there are pointers pointing to, say, strings, sizeof() will only count the sizes of these pointers (which is platform dependent, 4 bytes/pointer on Matrix). The actual size of these strings won't be counted.
Submitted by: Yiqi, Team 5
Q: When we are swapping structs, and lets say we have two instances of structs, so do we just swap struct1.int1 with struct2.int2? etc..
