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grasshopper
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Joined: 22 Jul 2021
Posts: 12
Location: germany
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The following array is declared for TAB:
DCL TAB (4,0:3,-4:-1) CHAR (01);
Which of the following statements will result in an indexing error?
- A = TAB (1,0,1)
- A = TAB (-1,0,1)
- A = TAB (0,0,0)
- A = TAB (3,3,3)
- A = TAB (3,3,-3)
- A = TAB (0,-1,-3)
- A = TAB (2,1,-2) |
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prino
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Joined: 07 Feb 2009
Posts: 1306
Location: Vilnius, Lithuania
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None of them when you compile with the default compiler options.
RTFM! |
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grasshopper
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Joined: 22 Jul 2021
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Location: germany
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| prino wrote: |
None of them when you compile with the default compiler options.
RTFM! |
Thank you very much.
if you have the time, can you please explainme how the indexing works.
what i know and learnt is:
DCL TAB (4,0:3,-4:-1) CHAR (01);
this is 3 dim array with lower and upper buonds specified with 1 element of char(01). Thank you sergeyken for explaning this. so the total number of instances will be 4+4+4 = 12. is this correct?
but what does the indexing mean ?
what i think is since the all indexing is within 4 (whichis the max no. of instances) they all point to some data, but if i say TAB(5,0,1= then it is an error? am i correct? please help. THAKN YOU |
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sergeyken
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Joined: 29 Apr 2008
Posts: 2022
Location: USA
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| grasshopper wrote: |
what i know and learnt is:
DCL TAB (4,0:3,-4:-1) CHAR (01);
this is 3 dim array with lower and upper buonds specified with 1 element of char(01). Thank you sergeyken for explaning this. so the total number of instances will be 4+4+4 = 12. is this correct? |
OMG!!
This is 3-dimensional array; its total number of elements is 4*4*4=64 items!!!!!!!!!
As a primitive example, consider a cube with each dimension equal to 4 units. The volume of this cube is not 4+4+4, but 4*4*4=64 cubic units!!!
At my school, we learned this during our first 4 years (at the age not older than 11 years).
This topic resembles me the clip available from YouTube: “ALTERNATIVE MATH”
It proves that 2+2=22   
Do we need to pass again the primary school study at this forum??? |
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grasshopper
New User
Joined: 22 Jul 2021
Posts: 12
Location: germany
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| sergeyken wrote: |
| grasshopper wrote: |
what i know and learnt is:
DCL TAB (4,0:3,-4:-1) CHAR (01);
this is 3 dim array with lower and upper buonds specified with 1 element of char(01). Thank you sergeyken for explaning this. so the total number of instances will be 4+4+4 = 12. is this correct? |
OMG!!
This is 3-dimensional array; its total number of elements is 4*4*4=64 items!!!!!!!!!
As a primitive example, consider a cube with each dimension equal to 4 units. The volume of this cube is not 4+4+4, but 4*4*4=64 cubic units!!!
At my school, we learned this during our first 4 years (at the age not older than 11 years).
This topic resembles me the clip available from YouTube: “ALTERNATIVE MATH”
It proves that 2+2=22
Do we need to pass again the primary school study at this forum??? |
yes, i agree.
64 instances.
so why is every indexing correct because it does not exceed the range? what is the right explanation? |
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