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鄭繼威發表於 2023-4-14 21:11 | 只看該作者

replace() 函式

試以 replace() 函式，將字串中的目標對象以特定字串取代。
<string> 標頭檔與 <algorithm> 標頭檔皆有提供 replace() 函式，但其用法與效果略有不同。

string::replace 參數說明
replace (size_t pos,  size_t len,  string);
size_t pos=你要換的index
size_t len=你要換的長度
const string& str=你要換的字串

std::replace 參數說明
replace (ForwardIterator first, ForwardIterator last,
                old_value, new_value)
ForwardIterator first=開始
ForwardIterator last=結束
old_value=要換的字元
new_value=要換成的字元
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,1,"a")<<endl;  //honolalu
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  //honolalu
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     //honolala
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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12#
楊芊琦發表於 2023-5-6 18:18 | 只看該作者
  1. #include<algorithm>
  2. using namespace std;

  4. int main()
  5. {
  6.     string word = "hohohohu";
  7.     cout << word.replace(0, 8, "Hello!") << endl;
  8.     cout << word << endl;
  9.     cout << word.replace(word.find("e"), 4, "ELLO") << endl;

  11.     string word2 = "hohohuhu";
  12.     replace(word2.begin(), word2.end(),'h','l');
  13.     cout << word2 << endl;
  14.     system("pause");
  15.     return 0;
  16. }
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11#
羅暐傑發表於 2023-4-22 11:12 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main(){
  7.     string str1="qwertyuiop";
  8.     cout<<str1.replace(5,3,"abc")<<endl;  
  9.    
  10.     string str2="qwertyuiop";
  11.     cout<<str2.replace(str2.find("u"),1,"p")<<endl;  
  12.    
  13.     string str3="qwertyuiop";
  14.     replace(str3.begin(),str3.end(),'q','z');
  15.     cout<<str3<<endl;
  16.    
  17.     system("pause");
  18.     return 0;
  19. }
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10#
宜儒發表於 2023-4-22 00:59 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,1,"a")<<endl;  //honolalu
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  //honolalu
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     //honolala
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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9#
徐啟祐發表於 2023-4-15 15:28 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main(){
  7.     string str1="efkiusef";
  8.     cout<<str1.replace(5,3,"a")<<endl;  
  9.    
  10.     string str2="efkiusef";
  11.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  
  12.    
  13.     string str3="efkiusef";
  14.     replace(str3.begin(),str3.end(),'u','a');
  15.     cout<<str3<<endl;
  16.    
  17.     system("pause");
  18.     return 0;
  19. }
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8#
翁川祐發表於 2023-4-15 15:27 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str="dfghyjukifh";
  9.     cout<<"原字串:"<<str<<endl;
  10.     cout<<str.replace(2,2,"A")<<endl;
  11.     string str2="dfghyjukifh";
  12.     replace(str2.begin(),str2.end(),'d','e');
  13.     cout<<str2<<endl;   
  14.    
  15.     system("pause");     
  16.     return 0;   
  17. }
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7#
葉佳和發表於 2023-4-15 15:24 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,1,"a")<<endl;  
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;   
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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6#
陳宥霖發表於 2023-4-15 15:23 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(2,3,"c")<<endl;  
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),5,"a")<<endl;  //honolalu
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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5#
陳牧謙發表於 2023-4-15 15:23 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,3,"a")<<endl;  
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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4#
陳泓亦發表於 2023-4-15 15:23 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,1,"a")<<endl;  //honolalu
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  //honolalu
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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3#
林雋喆發表於 2023-4-15 15:22 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,1,"a")<<endl;  //honolalu
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  //honolalu
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     //honolala
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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2#
吳俊頡發表於 2023-4-15 15:22 | 只看該作者
  1. #include<iostream>
  2. #include<cstdlib>
  3. #include<string>
  4. #include<algorithm>
  5. using namespace std;
  6. int main()
  7. {
  8.     string str1="honolulu";
  9.     cout<<str1.replace(5,1,"a")<<endl;  //honolalu
  10.    
  11.     string str2="honolulu";
  12.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  //honolalu
  13.    
  14.     string str3="honolulu";
  15.     replace(str3.begin(),str3.end(),'u','a');
  16.     cout<<str3<<endl;     
  17.    
  18.     system("pause");
  19.     return 0;
  20. }
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