字串處理 (一)

tonyh

我們在宣告字元陣列的時候要注意它的長度，以免位數不夠造成程式錯誤。事實上，每個字串後面都有一個 '\0' 的字元，例如 "tw" 字串，事實上總共用了 3 Bytes，若為中文字，則每個字要佔兩個字元。

例如:
char str[3]="tw";
char str[9]="字串處理"

試分別利用宣告字串與宣告字元陣列的方式, 在銀幕上顯示 "Good morning!" 字樣.

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="Good morning!";
   
7.     char str2[14]="Good morning!";
   
8.     cout<<str1<<endl;
   
9.     cout<<str2<<endl;
   
10.     cout<<str1[0]<<endl;
    
11.     cout<<str2[0]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14. }

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林政瑜

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="Good morning!";
   
7.     char str2[14]="Good morning!";
   
8.     cout<<str1<<endl;
   
9.     cout<<str2<<endl;
   
10.     cout<<str1[7]<<endl;
    
11.     cout<<str2[6]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14. }

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黃辰昊

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="Good morning!";
   
7.     char str2[14]="Good morning!";
   
8.     cout<<str1<<endl;
   
9.     cout<<str2<<endl;
   
10.     cout<<str1[0]<<endl;
    
11.     cout<<str2[0]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14. }

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李宇澤

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="Good morning!";
   
7.     char str2[14]="Good morning!";
   
8.     cout<<str1<<endl;
   
9.     cout<<str2<<endl;
   
10.     cout<<str1[0]<<endl;
    
11.     cout<<str2[0]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14. }

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孫嘉駿

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="Good morning!";
   
7.     char str2[14]="Good morning!";
   
8.     cout<<str1<<endl;
   
9.     cout<<str2<<endl;
   
10.     cout<<str1[0]<<endl;
    
11.     cout<<str2[0]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14. }

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董宸佑

1. #include<cstdlib>
   
2. #include<iostream>
   
3. #include<ctime>
   
4. using namespace std;
   
5. int main()
   
6. {
   
7.     string str1="Good morning!";;
   
8.     char str2[]="Good morning!";
   
9.     cout<<str1<<endl;
   
10.     cout<<str2<<endl;
    
11.     cout<<str1[3]<<endl;
    
12.     cout<<str2[7]<<endl;
    
13.     system("pause");
    
14.     return 0;   
    
15. }

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陳宥穎

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.   string s1="good morning";
   
7.   char s2[]="good morning";
   
8.   cout<<s1<<endl;
   
9.   cout<<s2<<endl;
   
10.   cout<<s1[0]<<endl;
    
11.   cout<<s2[0];
    
12.   system("pause");
    
13.   return 0;   
    
14. }

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蔡忻霓

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="Good morning!";
   
7.     char str2[14]="Good morning!";
   
8.     cout<<str1<<endl;
   
9.     cout<<str2<<endl;
   
10.     cout<<str1[0]<<endl;
    
11.     cout<<str2[0]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14.    
    
15. }

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黃宥華

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. using namespace std;
   
5. int main()
   
6. {
   
7.     string p="123";
   
8.     char j[]="123";
   
9.     cout<<p<<endl;
   
10.     cout<<j<<endl;
    
11.     cout<<p[0]<<endl;
    
12.     cout<<j[0]<<endl;
    
13.     system("pause");
    
14.     return 0;   
    
15. }

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