s******s
发帖数: 505 | 1 How to output in pointer format with cout?
for example, in C, printf("%p",charp);
Thank you. |
t****t
发帖数: 6806 | 2 %p basically means %#x. so it's just
cout<<"0x"< |
t****t
发帖数: 6806 | 3 let me correct myself -- actually, when you insert a pointer, the format
specifier is automatically %p. so just
cout<
is enough.
【在 t****t 的大作中提到】
: %p basically means %#x. so it's just
: cout<<"0x"<
|
s******s
发帖数: 505 | 4
1 #include
2
3 int main() {
4 char* cp;
5 cp = new char('a');
6 std::cout << cp << " . " << *cp << std::endl;
7 }
$ ./a.out
a . a
【在 t****t 的大作中提到】
: let me correct myself -- actually, when you insert a pointer, the format
: specifier is automatically %p. so just
: cout<: is enough.
|
t****t
发帖数: 6806 | 5 char* or const char* are special so that they are output as string. cast it
to (void*).
【在 s******s 的大作中提到】
:
: 1 #include
: 2
: 3 int main() {
: 4 char* cp;
: 5 cp = new char('a');
: 6 std::cout << cp << " . " << *cp << std::endl;
: 7 }
: $ ./a.out
: a . a
|
s******s
发帖数: 505 | 6
it
That works! Thank you!
【在 t****t 的大作中提到】
: char* or const char* are special so that they are output as string. cast it
: to (void*).
|
s******s
发帖数: 505 | 7 another question,
y = 6.0;
cout << y << endl;
will output '6'.
How to make it output '6.00'? |
f******y
发帖数: 2971 | 8 std::setprecision(2)
【在 s******s 的大作中提到】
: another question,
: y = 6.0;
: cout << y << endl;
: will output '6'.
: How to make it output '6.00'?
|
s******s
发帖数: 505 | 9
setprecision(2) makes 6.666 to 6.66, but not 6 to 6.00
【在 f******y 的大作中提到】
: std::setprecision(2)
|
t****t
发帖数: 6806 | 10 (in addition to setprecision)
cout<
or
cout.fixed();
to cancel, use
str.setf(~ios_base::floatfield, ios_base::floatfield);
【在 s******s 的大作中提到】
:
: setprecision(2) makes 6.666 to 6.66, but not 6 to 6.00
|
s******s
发帖数: 505 | 11
Thank you, by the way, is there a way to print a boolean
variable as 'true/false' instead of '0/1' by setting flags
or using manipulators?
【在 t****t 的大作中提到】
: (in addition to setprecision)
: cout<: or
: cout.fixed();
: to cancel, use
: str.setf(~ios_base::floatfield, ios_base::floatfield);
|
t****t
发帖数: 6806 | 12 cout<
cout<
go buy a reference book.
【在 s******s 的大作中提到】
:
: Thank you, by the way, is there a way to print a boolean
: variable as 'true/false' instead of '0/1' by setting flags
: or using manipulators?
|
s******s
发帖数: 505 | 13
blush; thank you.
【在 t****t 的大作中提到】
: cout<: cout<: go buy a reference book.
|
