Hi I to all I have the following question, I hope you can help me:
I need to store variables, in diferent variable types, but I want to know for example the size of the int type what size of number I can store, I found that int can store 4 bytes, but I don't undertand what size is this?
I found the following explination, with all the sizes.
http://msdn2.microsoft.com/en-us/library/cc953fe1.aspx
My question is if I have an integer, and its writen 4 bytes how it look the number in decimal.
Thanks
dev.cplusplus
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Jump to PostEach byte is 8 bits. 8 bits can hold from the value 0 to 2^8th (2 to the 8th power) or 0-255. Therefore 4 bytes can hold up to 2^(4*8) or 2^32nd. That's 4,294,967,296.
Now these are for unsigned values. Normally, though, values are signed which means 1 bit …
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WaltP
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Each byte is 8 bits. 8 bits can hold from the value 0 to 2^8th (2 to the 8th power) or 0-255. Therefore 4 bytes can hold up to 2^(4*8) or 2^32nd. That's 4,294,967,296.
Now these are for unsigned values. Normally, though, values are signed which means 1 bit is used to indicate positive or negative. Therefore 1 less bit. In this case:
8 bits hold the values -128 to 127 (2^7th). 4 bytes can hold up to 2^((4*8)-1) or 2^31st. -2,147,483,649 to 2,147,483,648.
A better explanation is here
Ancient Dragon
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you can find the maximum and minimum values for any POD (Plain Old Data) types in the file limits.h that is in your compiler's include directory.
jbennet
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thanks people this was handy for my computing homework (we were seeing how may coloirs and resolutions differnent video card memories can support
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