A file containing a C++ program usually ends with the extension .cpp. Prompt lines are executable statements that tell the user what to do.

Mark the following statements as true or false.

a. An identifier can be any sequence of digits and letters.

b. In C++, there is no difference between a reserved word and a predefined identifier.

c. A C++ identifier can start with a digit.

d. The operands of the modulus operator must be integers.

e. If a = 4; and b = 3;, then after the statement a = b; the value of b is still 3.

f. In the statement cin >> y;, y can only be an int or a double variable.

g. In an output statement, the newline character may be a part of the string.

h. The following is a legal C++ program: int main ()

{

return 0;

}

i. In a mixed expression, all the operands are converted to floating-point numbers.

j. Suppose x = 5. After the statement y = x++; executes, y is 5 and x is 6.

k. Suppose a = 5. After the statement ++a; executes, the value of a is still 5 because the value of the expression is not saved in another variable.