Term
| what is the stream extraction operator? |
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Definition
| this is the stream extraction operator (>>) i.e. cin |
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Term
| what happens when a variable is defined as an integer, but it is entered as a floating point? |
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Definition
| the decimal will not be read |
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Term
| how do you enter a string array and how do you define it? |
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Definition
| the string must be defined i.e. char, and how many spaces it will occupy, i.e. char name[21], with the +1 being the null terminator |
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Term
| if you have two variables, i.e. length and width, how would you use cin to enter them right after another? |
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Definition
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Term
| what is a string array, in general terms, when do you use it? |
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Definition
| its a string of characters that you can enter, i.e. John |
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Term
| what is the header that you must include to use the pow function? |
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Definition
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Term
| how would you state 4 to the power of 2? |
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Definition
| pow(4.0,2.0) remember to use #include cmath |
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Term
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Definition
| this is when C++ automatically converts operands to the same type, i.e. all double or all int or all float |
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Term
| please refer to pg.97 for data type ranking! |
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Definition
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Term
| what is the highest data type? |
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Definition
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Term
| what is the lowest data type? |
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Definition
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Term
| what usually happens when an integer overflows? |
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Definition
| it goes to the lowest value possible (wraps around) |
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Term
| what usually happens when an integer underflows? |
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Definition
| it goes the highest value possible (because it wraps around from the lowest value) |
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Term
| what is the command for typecasting a variable? |
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Definition
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Term
| with static casting, why is this statment dangerous? perMonth = static_cast double (books/months)? |
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Definition
| because it will result in integer division |
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Term
| what is a named constant, what is it used for? |
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Definition
| making a variable a read only, useful for assigning variables when you want to use words, not numbers |
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Term
| what is the command for a constant, give an example for a constant of x? |
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Definition
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Term
| why do you use usually use constants with cstrings? |
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Definition
| you use them to identify the size of the array, i.e const int SIZE = 21, char name [SIZE]; makes it easier to use and understand |
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Term
| what is the preprocessor command to use setw? |
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Definition
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Term
| what is the purpose of using setw, how do you use it (example)? |
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Definition
| to set the amount of space for a variable following it |
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Term
| how do you use the setprecision manipulator? |
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Definition
| use it to set a number of predefined signigicant digits, setprecision(5) for example, if setprecsion(3) and x = 28.92786 output = 28.9 or 3 sig. fig. regardless of decimal |
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Term
| how do you use the fixed manipulator? |
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Definition
| cout<< setprecison(2) << fixed; this will automatically set the variable to a decimal |
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Term
| how do you use the showpoint manipulator? |
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Definition
| it will add zeroes to a number till you hit the predetermined size. i.e. double x=123.4; cout< |
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Term
| how do you use left and right manipulators? |
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Definition
| you use them for justification to the left or right, cout< |
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