CSTRING转换成int

[liu7716640]

如何把cstring类型的字符串转换成可以用于计算的int类型
比功能如我现在
CString text_value；
先把text_value改成用于计算的int类型，求指教

[zerglordyzj]

atoi

[liu7716640]

[Quote=引用 1 楼 的回复:]
atoi
[/Quote]
可以写的详细点吗 谢谢

[小新小小新]

习惯用_ttoi,另外cstring使用时最好用
_ttoi(str.GetBuffer());
str.ReleaseBuffer();

[Eleven]

_ttoi(str);

[华美乐章]

atoi(text_value);

[lgh082]

CString str;
int i=0;
str.Format("%d",i);//将整形转换成CString类型
i=atoi(str); //将CString转换成Int类型

[南京短暂的春天]

_ttoi(CString str);
如果你是想把一个CEdit编辑框控件中输入的数字直接带到程序里
我建议你把那个控件关联变量的类型选为int
这样就不用转来转去折腾了

[rxguoblp]

没那么麻烦，直接int result = atoi(text_value)。result 就是你想要的整形数值。

[jianghandaxue]

atoi 不解释了

[fujialin2011]

要学会使用msdn：
Convert a string to integer.


int atoi(
const char *str
);
int _wtoi(
const wchar_t *str
);
int _atoi_l(
const char *str,
_locale_t locale
);
int _wtoi_l(
const wchar_t *str,
_locale_t locale
);


Parameters
str
String to be converted.

locale
Locale to use.

Return Value
Each function returns the int value produced by interpreting the input characters as a number. The return value is 0 for atoi and _wtoi, if the input cannot be converted to a value of that type.

In Visual C++ 2005, in the case of overflow with large negative integral values, LONG_MIN is returned. atoi and _wtoi return INT_MAX and INT_MIN on these conditions. In all out-of-range cases, errno is set to ERANGE. If the parameter passed in is NULL, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, these functions set errno to EINVAL and return 0.

Remarks
These functions convert a character string to an integer value (atoi and _wtoi). The input string is a sequence of characters that can be interpreted as a numerical value of the specified type. The function stops reading the input string at the first character that it cannot recognize as part of a number. This character may be the null character ('\0' or L'\0') terminating the string.

The str argument to atoiand _wtoi has the following form:

[whitespace] [sign] [digits]]

A whitespace consists of space or tab characters, which are ignored; sign is either plus (+) or minus (–); and digits are one or more digits.

The versions of these functions with the _l suffix are identical except that they use the locale parameter passed in instead of the current locale. For more information, see Locale.

[yyps]

CString s(_T(“12”))；
int n = atoi(s);

-->n = 12.
别说不行...