C++ Tutorial/Operators statements/continue
Версия от 14:21, 25 мая 2010; (обсуждение)
break and continue statements
#include <iostream>
using namespace std;
int main()
{
int count = 0;
while (true)
{
count += 1;
//end loop if count is greater than 10
if (count > 10)
break;
//skip the number 5
if (count == 5)
continue;
cout << count << endl;
}
return 0;
}Set up 3 stop conditions for the loop: break and continue
#include <iostream>
using namespace std;// this file uses std::cout,
// std::cin, std::endl, etc.
int main()
{
unsigned short small = 1;
unsigned long large = 10;
unsigned long skip = 2;
unsigned long target = 8;
const unsigned short MAXSMALL=65535;
while (small < large && large > 0 && small < 65535)
{
small++;
if (small skip == 0)// skip the decrement?
{
cout << "skipping on " << small << endl;
continue;
}
if (large == target) // exact match for the target?
{
cout << "Target reached!";
break;
}
large-=2;
}
cout << "\nSmall: " << small << " Large: " << large << endl;
return 0;
}skipping on 2 skipping on 4 Target reached! Small: 5 Large: 8
Using the continue statement with do while loop
#include <iostream>
#include <iomanip>
#include <cctype>
#include <limits>
using std::cout;
using std::endl;
using std::setw;
int main() {
cout << endl
<< setw(13) << "Character "
<< setw(13) << "Hexadecimal "
<< setw(13) << "Decimal "
<< endl;
cout << std::uppercase;
unsigned char ch = 0;
do {
if(!std::isprint(ch))
continue;
cout << setw(7) << ch
<< std::hex
<< setw(13) << static_cast<int>(ch)
<< std::dec
<< setw(13) << static_cast<int>(ch)
<< endl;
} while(ch++ < std::numeric_limits<unsigned char>::max());
return 0;
}Character Hexadecimal Decimal
20 32
! 21 33
" 22 34
# 23 35
$ 24 36
% 25 37
& 26 38
" 27 39
( 28 40
) 29 41
* 2A 42
+ 2B 43
, 2C 44
- 2D 45
. 2E 46
/ 2F 47
0 30 48
1 31 49
2 32 50
3 33 51
4 34 52
5 35 53
6 36 54
7 37 55
8 38 56
9 39 57
: 3A 58
; 3B 59
< 3C 60
= 3D 61
> 3E 62
? 3F 63
@ 40 64
A 41 65
B 42 66
C 43 67
D 44 68
E 45 69
F 46 70
G 47 71
H 48 72
I 49 73
J 4A 74
K 4B 75
L 4C 76
M 4D 77
N 4E 78
O 4F 79
P 50 80
Q 51 81
R 52 82
S 53 83
T 54 84
U 55 85
V 56 86
W 57 87
X 58 88
Y 59 89
Z 5A 90
[ 5B 91
\ 5C 92
] 5D 93
^ 5E 94
_ 5F 95
" 60 96
a 61 97
b 62 98
c 63 99
d 64 100
e 65 101
f 66 102
g 67 103
h 68 104
i 69 105
j 6A 106
k 6B 107
l 6C 108
m 6D 109
n 6E 110
o 6F 111
p 70 112
q 71 113
r 72 114
s 73 115
t 74 116
u 75 117
v 76 118
w 77 119
x 78 120
y 79 121
z 7A 122
{ 7B 123
| 7C 124
} 7D 125
~ 7E 126
