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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. }
複製代碼

  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.     string str2="honolulu";
  11.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  
  12.     string str3="honolulu";
  13.     replace(str3.begin(),str3.end(),'u','a');
  14.     cout<<str3<<endl;     
  15.     system("pause");
  16.     return 0;
  17. }
複製代碼

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  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.     string str2="honolulu";
  11.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;
  12.     string str3="honolulu";
  13.     replace(str3.begin(),str3.end(),'u','a');
  14.     cout<<str3<<endl;
  15.     system("pause");
  16.     return 0;
  17. }
複製代碼

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  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.     string str2="honolulu";
  11.     cout<<str2.replace(str2.find("u"),1,"a")<<endl;  
  12.     string str3="honolulu";
  13.     replace(str3.begin(),str3.end(),'u','a');
  14.     cout<<str3<<endl;   
  15.     system("pause");
  16.     return 0;
  17. }
複製代碼

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  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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