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Most of the time, if you choose the proper C data type for each object in your program, you need not be concerned with just how it is represented or how many bits it uses. When you do need such information, the C language itself does not provide a way to get it. The header files `limits.h' and `float.h' contain macros which give you this information in full detail.
A.5.1 Computing the Width of an Integer Data Type How many bits does an integer type hold? A.5.2 Range of an Integer Type What are the largest and smallest values that an integer type can hold? A.5.3 Floating Type Macros Parameters that measure the floating point types. A.5.4 Structure Field Offset Measurement Getting measurements on structure types.
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