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

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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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何權晉

1. #include<iostream>
   
2. #include<cmath>
   
3. using namespace std;
   
4. int main()
   
5. {
   
6.     string st="dsanfj";
   
7.     cout<<st.replace(2,1,"j")<<endl;
   
8.    
   
9.    
   
10. system("pause");
    
11. return 0;
    
12. }

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盧玄皓

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. #include<algorithm>
   
5. using namespace std;
   
6. int main()
   
7. {
   
8.     string str1="gfygosi";
   
9.     cout<<str1.replace(2,1,"a")<<endl;  
   
10.    
    
11.     string str2="ho8yuptiu9e";
    
12.     cout<<str2.replace(str2.find("8"),1,"k")<<endl;  
    
13.    
    
14.      
    
15.    
    
16.     system("pause");
    
17.     return 0;
    
18. }

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張絜晰

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. using namespace std;
   
5. int main()
   
6. {
   
7.     string s="yomama";
   
8.     cout<<"the string:"<<s<<endl;
   
9.     cout<<s.replace(3,4,"other")<<endl;
   
10.    
    
11.     string s2="yomama";
    
12.     cout<<"the string:"<<s2<<endl;
    
13.     cout<<s2.replace(s2.find("ma"),4," ")<<endl;
    
14.    
    
15.     string s3="yomama";
    
16.     cout<<"the string:"<<s3<<endl;
    
17.     cout<<s3.replace(s3.begin(3),s3.end(),'a','a')<<endl;
    
18.    
    
19.     system("pause");
    
20.     return 0;   
    
21. }
    

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邱品惟

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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黃品禎

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. #include<algorithm>
   
5. using namespace std;
   
6. int main()
   
7. {   
   
8.     string str="hello";
   
9.     cout<<"原:"<<str<<endl;
   
10.     cout<<str.replace(1,2,"df")<<endl;
    
11.     replace(str.begin(),str.end(),'l','a');
    
12.     cout<<str;
    
13.     system("pause");
    
14.     return 0;
    
15. }   

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李宗儒

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<string>
   
4. #include<algorithm>
   
5. using namespace std;
   
6. 
   
7. int main()
   
8. {
   
9.     string a1="bengchiling";
   
10.     cout<<a1<<endl;
    
11.     cout<<a1.replace(4,1,"Z")<<endl;
    
12.     string a2="bengchiling";
    
13.     cout<<a2.replace(a2.find("g"),1,"QQ")<<endl;
    
14.     cout<<a2.replace(a2.find("g"),1,"QQ")<<endl;
    
15.     string a3="bengchiling";
    
16.     replace(a3.begin(),a3.end(),'n','o');
    
17.     cout<<a3<<endl;
    
18. }

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朱奕祈

1. #include<iostream>
   
2. #include<cstdlib>
   
3. #include<ctime>
   
4. #include<cmath>
   
5. #include<string>
   
6. #include<algorithm>
   
7. using namespace std;
   
8. int main()
   
9. {
   
10.         string str1="apple0123456789";
    
11.     cout<<str1.replace(4,7,"G")<<endl;
    
12.     string str3="apple0123456789";
    
13.     replace(str3.begin(),str3.end(),'p','g');
    
14.     cout<<str3<<endl;
    
15.    
    
16.         system("pause");
    
17.     return 0;
    
18. }

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