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字串處理 (一)

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. }
複製代碼

  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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hahahahahahahaha

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  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. }
複製代碼

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  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. }
複製代碼

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  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. }
複製代碼

TOP

  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. }
複製代碼

TOP

  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. }
複製代碼
李宇澤Oscar

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  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. }
複製代碼
Huang chenhao

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  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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