Macintosh-194:131lect08-1 smtuttle$ expr_play
----------------------------------------------
Welcome to the 03-03-10 version of expr_play!
----------------------------------------------

Are there any already-created C++ functions (in the current 
   working directory) which you would like to be able to use
   within C++ expressions?
   (type y if so, n if not)
your answer: n

Enter a C++ expression, and type enter
   (or type q to quit):
3 + 5

value of 3 + 5: 
8

Enter next C++ expression and type enter
   (or type q to quit):
4 / 5

value of 4 / 5: 
0

Enter next C++ expression and type enter
   (or type q to quit):
4.0 / 5.0

value of 4.0 / 5.0: 
0.8

Enter next C++ expression and type enter
   (or type q to quit):
4.0 / 5

value of 4.0 / 5: 
0.8

Enter next C++ expression and type enter
   (or type q to quit):
10 / 3

value of 10 / 3: 
3

Enter next C++ expression and type enter
   (or type q to quit):
-10 / 3

value of -10 / 3: 
-3

Enter next C++ expression and type enter
   (or type q to quit):
5 / 2

value of 5 / 2: 
2

Enter next C++ expression and type enter
   (or type q to quit):
5 % 2

value of 5 % 2: 
1

Enter next C++ expression and type enter
   (or type q to quit):
PI

try_expr9.cpp: In function ‘int main()’:
try_expr9.cpp:9: error: ‘PI’ was not declared in this scope
*****************************************************
Are you sure that PI is truly a C++ arithmetic
   expression (with no variables)?
Chances are good that it is not; the above are C++
   compiler messages. Save them and show them to 
   your prof if you have questions.
*****************************************************

Enter next C++ expression and type enter
   (or type q to quit):
1.0 / 3 

value of 1.0 / 3: 
0.333333

Enter next C++ expression and type enter
   (or type q to quit):
3 + 5 * 8

value of 3 + 5 * 8: 
43

Enter next C++ expression and type enter
   (or type q to quit):
(3 + 5) * 8

value of (3 + 5) * 8: 
64

Enter next C++ expression and type enter
   (or type q to quit):
(((3) + (5)) * 8)

value of (((3) + (5)) * 8): 
64

Enter next C++ expression and type enter
   (or type q to quit):
(3 +)

try_expr14.cpp: In function ‘int main()’:
try_expr14.cpp:9: error: expected primary-expression before ‘)’ token
*****************************************************
Are you sure that (3 +) is truly a C++ arithmetic
   expression (with no variables)?
Chances are good that it is not; the above are C++
   compiler messages. Save them and show them to 
   your prof if you have questions.
*****************************************************

Enter next C++ expression and type enter
   (or type q to quit):
^Z
[2]+  Stopped                 expr_play
Macintosh-194:131lect08-1 smtuttle$ ls
131lect08-1-play	  	    try_expr2
131lect08-1-projected.txt	    try_expr2.cpp
131lect08-1-projected.txt~	    try_expr3
131lect08-1.odt			    try_expr3.cpp
131lect08-1.pdf			    try_expr4
try_expr1			    try_expr4.cpp
try_expr1.cpp			    try_expr5
try_expr10			    try_expr5.cpp
try_expr10.cpp			    try_expr6
try_expr11			    try_expr6.cpp
try_expr11.cpp			    try_expr7
try_expr12		            try_expr7.cpp
try_expr12.cpp			    try_expr8
try_expr13			    try_expr8.cpp
try_expr13.cpp			    try_expr9.cpp
try_expr14.cpp
Macintosh-194:131lect08-1 smtuttle$ fg
expr_play
3 - 7

value of 3 - 7: 
-4

Enter next C++ expression and type enter
   (or type q to quit):
true

value of true: 
true

Enter next C++ expression and type enter
   (or type q to quit):
3 < 5

value of 3 < 5: 
true

Enter next C++ expression and type enter
   (or type q to quit):
3 > 5

value of 3 > 5: 
false

Enter next C++ expression and type enter
   (or type q to quit):
3 <= 5

value of 3 <= 5: 
true

Enter next C++ expression and type enter
   (or type q to quit):
4 >= 4

value of 4 >= 4: 
true

Enter next C++ expression and type enter
   (or type q to quit):
3 + 5 == 8

value of 3 + 5 == 8: 
true

Enter next C++ expression and type enter
   (or type q to quit):
(3 + 5) == 8

value of (3 + 5) == 8: 
true

Enter next C++ expression and type enter
   (or type q to quit):
3 != 4

value of 3 != 4: 
true

Enter next C++ expression and type enter
   (or type q to quit):
3 = 5

try_expr24.cpp: In function ‘int main()’:
try_expr24.cpp:9: error: lvalue required as left operand of assignment
*****************************************************
Are you sure that 3 = 5 is truly a C++ arithmetic
   expression (with no variables)?
Chances are good that it is not; the above are C++
   compiler messages. Save them and show them to 
   your prof if you have questions.
*****************************************************

Enter next C++ expression and type enter
   (or type q to quit):
'a' == 'a'

value of 'a' == 'a': 
true

Enter next C++ expression and type enter
   (or type q to quit):
"a" == "a"

try_expr26.cpp: In function ‘int main()’:
try_expr26.cpp:9: error: invalid operands of types ‘const char [2]’ and ‘const char [3]’ to binary ‘operator<<’
*****************************************************
Are you sure that "a" == "a" is truly a C++ arithmetic
   expression (with no variables)?
Chances are good that it is not; the above are C++
   compiler messages. Save them and show them to 
   your prof if you have questions.
*****************************************************

Enter next C++ expression and type enter
   (or type q to quit):
true and false

value of true and false: 
false

Enter next C++ expression and type enter
   (or type q to quit):
(3 < 5) && (5 < 8)

value of (3 < 5) && (5 < 8): 
true

Enter next C++ expression and type enter
   (or type q to quit):
(3 < 5) and (5 < 8)

value of (3 < 5) and (5 < 8): 
true

Enter next C++ expression and type enter
   (or type q to quit):
not true

value of not true: 
false

Enter next C++ expression and type enter
   (or type q to quit):
!true

value of !true: 
false

Enter next C++ expression and type enter
   (or type q to quit):
true || false

value of true || false: 
true

Enter next C++ expression and type enter
   (or type q to quit):
true or false

value of true or false: 
true

Enter next C++ expression and type enter
   (or type q to quit):
3 not = 5

try_expr34.cpp: In function ‘int main()’:
try_expr34.cpp:9: error: expected `)' before ‘!’ token
*****************************************************
Are you sure that 3 not = 5 is truly a C++ arithmetic
   expression (with no variables)?
Chances are good that it is not; the above are C++
   compiler messages. Save them and show them to 
   your prof if you have questions.
*****************************************************

Enter next C++ expression and type enter
   (or type q to quit):
not(3 == 5)

value of not(3 == 5): 
true

Enter next C++ expression and type enter
   (or type q to quit):
q

Quitting expr_play ... goodbye.

Macintosh-194:131lect08-1 smtuttle$