标签:lower clear comm 运行 print article toolbar http end
STL的algorithm库确实给我们提供了这样的便利,使用模板函数transform可以轻松解决这个问题,开发人员只需要提供一个函数对象,例如将char转成大写的toupper函数或者小写的函数tolower函数。
transform原型:
 1 #include <string>  
 2 #include <algorithm>  
 3 using namespace std;  
 4       
 5 int main()  
 6 {  
 7         string strA = "yasaken@126.com";  
 8         string strB = "LURY@LENOVO.com";  
 9         printf("Before transform:\n");  
10         printf("strA:%s \n", strA.c_str());  
11         printf("strB:%s \n\n", strB.c_str());  
12       
13         transform(strA.begin(), strA.end(), strA.begin(), ::toupper);  
14         transform(strB.begin(), strB.end(), strB.begin(), ::toupper);  
15         printf("After transform to toupper:\n");  
16         printf("strA:%s \n", strA.c_str());  
17         printf("strB:%s \n\n", strB.c_str());  
18       
19         transform(strA.begin(), strA.end(), strA.begin(), ::tolower);  
20         transform(strB.begin(), strB.end(), strB.begin(), ::tolower);  
21         printf("After transform to lower:\n");  
22         printf("strA:%s \n", strA.c_str());  
23         printf("strB:%s \n\n", strB.c_str());  
24         return 0;  
25 }  
运行结果:
1 strA:yasaken@126.com 2 strB:LURY@LENOVO.com 3 4 After transform to toupper: 5 strA:YASAKEN@126.COM 6 strB:LURY@LENOVO.COM 7 8 After transform to lower: 9 strA:yasaken@126.com 10 strB:lury@lenovo.com
标签:lower clear comm 运行 print article toolbar http end
原文地址:http://www.cnblogs.com/superxuezhazha/p/6393101.html