replace() 函式

鄭繼威

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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林劭杰

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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黃裕恩

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. }

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李彣

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. }

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林劭澧

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. }

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