函数与函数对象.

[du51]

经常见到网上有.如下的语句:
string s("heLLo");
transform(s.begin(), s.end(), s.begin(), toupper);

toupper是C的函数
但是,我从来没有编译通过.怎样才能通过?

[PMsg]

Standard C++ Library Reference

toupperSee Also
<locale> Members
Converts a character to upper case.

template<Class CharType>
CharType toupper(
CharType _Ch,
const locale& _Loc
) const;
Parameters
_Ch
The character to be converted to upper case.
_Loc
The locale containing the character to be converted.
Return Value
The character converted to upper case.

Remarks
The template function returns use_facet<ctype<CharType> >(_Loc).toupper(_Ch).

Example
// locale_toupper.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>
using namespace std;

int main( )
{
locale loc ( "German_Germany" );
char result1 = toupper ( 'h', loc );
cout << "The upper case of 'h' in the locale is: "
<< result1 << "." << endl;
char result2 = toupper ( 'H', loc );
cout << "The upper case of 'H' in the locale is: "
<< result2 << "." << endl;
char result3 = toupper ( '$', loc );
cout << "The upper case of '$' in the locale is: "
<< result3 << "." << endl;
}
Output
The upper case of 'h' in the locale is: H.
The upper case of 'H' in the locale is: H.
The upper case of '$' in the locale is: $.
See Also
<locale> Members



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[foochow]

可以通过啊

[du51]

把你文件贴出来.

[du51]

还有一楼的..
STL的国际化那部分我还没看到.不敢乱说..
但是那个程序,在DEV-CPP下运行挂了.
是和系统有关吗?

[sinall]

include <iostream>
#include <string>
#include <algorithm>
#include <locale>
#include <functional>
using namespace std;

int main(void)
{
string s("heLLo");
transform(s.begin(), s.end(), s.begin(), ptr_fun<int, int>(&toupper));
cout << s << endl;
return 0;
}
或者：
#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
using namespace std;

int main(void)
{
string s("heLLo");
transform(s.begin(), s.end(), s.begin(), ::toupper);
cout << s << endl;
return 0;
}

[sinall]

可能是：
v2401% man -all toupper
toupper (3c++) -M /opt/SUNWspro/man
toupper (3c) -M /usr/man

两个toupper冲突，如果选择c++风格的toupper，则需要ptr_fun<int, int>(&toupper)进行实例化。

[du51]

谢谢楼上了.明白了..
我试了好几次,没带参数..
转binary_function又转不了.

谢谢了.

[Dong]

#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

typedef int (*fun)(int);
void test(char* s,fun f)
{
while(*s != '\0')
{
putchar(f(*s));
s++;
}
}

main()
{
char str[10];
strcpy(str,"shENg");
test(str,toupper);
printf("\n");
test(str,tolower);
getchar();
}

[du51]

UPCC实在不好意思..
我结贴子的时候,还没见到你回..
以后分再补上...不好意思呀..