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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李沛昂

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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洪翊展

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[1]<<endl;
    
11.     cout<<str2[1]<<endl;
    
12.     system("pause");
    
13.     return 0;   
    
14. }

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戴嘉禾

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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洪翊庭

1. #include<iostream>
   
2. #include<cstdlib>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string str1="ppppp";
   
7.     char str2[6]="ppppp";
   
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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黃宇瑄

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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曾堂桂

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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黃宇綸

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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