Posted on 2007-07-01 02:46
MiweiDev 閱讀(622)
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C / C++Language
3.5 字符常量和字符串常量的區(qū)別:
答案:字符常量是一個(gè)字符,用單引號(hào)括起來(lái),而字符串常量是有零個(gè)或一組字符組成,用雙引號(hào)括起來(lái),存儲(chǔ)時(shí)自動(dòng)在后面加上'/0'作為結(jié)尾,因此在開(kāi)辟字符串?dāng)?shù)組的長(zhǎng)度時(shí)候應(yīng)該是字符串長(zhǎng)度加一.
3.6 譯碼:把China 譯成密碼:要求所有的字符都向后面移動(dòng)四位:
1
//方法一：適用于用戶的直接輸入的字符串來(lái)譯碼！
2#include <stdio.h>
3
4void main()
5{
6 char strArray[] = "China";
7 char c = ' ';
8 int i = 0;
9
10 while((c = strArray[i]) != 0)
11 {
12 if(c == 'w')
13 {
14 c = 'a';
15 }
16 else if(c == 'x')
17 {
18 c = 'b';
19 }
20 else if(c == 'y')
21 {
22 c = 'c';
23 }
24 else if(c == 'z')
25 {
26 c = 'd';
27 }
28 else if(c == 'W')
29 {
30 c = 'A';
31 }
32 else if(c == 'X')
33 {
34 c = 'B';
35 }
36 else if(c == 'Y')
37 {
38 c = 'C';
39 }
40 else if(c == 'Z')
41 {
42 c = 'D';
43 }
44 else
45 {
46 c += 4;
47 }
48 printf("%c",c);
49 i++;
50 }
51 printf("\n");
52}
1//方法二：對(duì)于本題比較直接:
2#include <stdio.h>
3
4void main()
5{
6 char c1 = 'C', c2 = 'h', c3 = 'i', c4 = 'n', c5 = 'a';
7
8 c1 += 4;
9 c2 += 4;
10 c3 += 4;
11 c4 += 4;
12 c5 += 4;
13 printf("%c%c%c%c%c\n",c1,c2,c3,c4,c5);
14}