C++中的wcschr()函数在宽字符串搜索宽字符的首次出现。终止的null宽字符被视为字符串的一部分。因此,还可以定位它以便检索指向宽字符串末尾的指针。
句法:
const wchar_t* wcschr (const wchar_t* ws, wchar_t wc)
wchar_t* wcschr ( wchar_t* ws, wchar_t wc)
参数:该函数接受两个强制性参数,如下所述:
- ws:指向要搜索的以空终止的宽字符串的指针
- wc:要定位的宽字符
返回值:该函数返回两个值,如下所示:
- 指向字符串字符首次出现的指针。
- 如果找不到字符,则该函数返回空指针。
下面的程序说明了上述函数:
程序1:
// C++ program to illustrate
// wcschr() function
#include
using namespace std;
int main()
{
// initialize wide string
wchar_t ws[] = L"This is some good coding";
wchar_t* point;
wprintf(L"Looking for the 'o' character in \"%ls\"...\n", ws);
// initialize the search character
point = wcschr(ws, L'o');
// search the place and print
while (point != NULL) {
wprintf(L"found at %d\n", point - ws + 1);
point = wcschr(point + 1, L'o');
}
return 0;
}
输出:
Looking for the 'o' character in "This is some good coding"...
found at 10
found at 15
found at 16
found at 20
程序2:
// C++ program to illustrate
// wcschr() function
#include
using namespace std;
int main()
{
// initialize wide string
wchar_t ws[] = L"geekforgeeks";
wchar_t* point;
wprintf(L"Looking for the 'g' character in \"%ls\"...\n", ws);
// initialize the search character
point = wcschr(ws, L'g');
// search the place and print
while (point != NULL) {
wprintf(L"found at %d\n", point - ws + 1);
point = wcschr(point + 1, L'g');
}
return 0;
}
输出:
Looking for the 'g' character in "geekforgeeks"...
found at 1
found at 8
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