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First question:
Second question:
If a C/C++ standard specifies answers to above questions, what paragraphs are related to them?
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An unsigned Integer means the variable can hold only a positive value. This format specifier is used within the printf() function for printing the unsigned integer variables. Syntax: printf(“%u”, variable_name);
Unsigned long variables are extended size variables for number storage, and store 32 bits (4 bytes). Unlike standard longs unsigned longs won't store negative numbers, making their range from 0 to 4,294,967,295 (2^32 - 1).
Maximum value of unsigned short int in C++ It is the smallest (16 bit) integer data type in C++. Some properties of the unsigned short int data type are: Being an unsigned data type, it can store only positive values. Takes a size of 16 bits.
Yes, these are guaranteed. In C++11, see §7.1.6.2[dcl.type.simple]/table 10, which lists all of the simple type specifiers (and combinations thereof) and what they mean. For example, the table includes the following:
unsigned => unsigned int
unsigned int => unsigned int
signed => int
signed int => int
int => int
C11 has a similar mapping in §6.7.2/2 (it's formatted differently, but otherwise it specifies the same groups of equivalent combinations, at least for all of the types common to C and C++).
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