大约有 40,000 项符合查询结果（耗时：0.0264秒） [XML]
How can I check if a single character appears in a string?
...
You can use string.indexOf('a').
If the char a is present in string :
it returns the the index of the first occurrence of the character in
the character sequence represented by this object, or -1 if the
character does not occur...
How to Parse Command Line Arguments in C++? [duplicate]
...t;algorithm>
char* getCmdOption(char ** begin, char ** end, const std::string & option)
{
char ** itr = std::find(begin, end, option);
if (itr != end && ++itr != end)
{
return *itr;
}
return 0;
}
bool cmdOptionExists(char** begin, char** end, const std::s...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
... problems if the compiler had to "arrange for another behaviour" (e.g. use extra instructions to check for potential overflow and calculate differently in that case).
It is also worth noting that "undefined behaviour" doesn't mean "doesn't work". It means that the implementation is allowed to do w...
Find and extract a number from a string
I have a requirement to find and extract a number contained within a string.
29 Answers
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Efficient way to remove ALL whitespace from String?
...s to remove all whitespace (including newlines) and doing this (XML is the string received from the web request):
16 Answer...
How to change string into QString?
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If by string you mean std::string you can do it with this method:
QString QString::fromStdString(const std::string & str)
std::string str = "Hello world";
QString qstr = QString::fromStdString(str);
If by string you mean ...
Divide a number by 3 without using *, /, +, -, % operators
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Use itoa to convert to a base 3 string. Drop the last trit and convert back to base 10.
// Note: itoa is non-standard but actual implementations
// don't seem to handle negative when base != 10.
int div3(int i) {
char str[42];
sprintf(str, "%d", IN...
Is multiplication and division using shift operators in C actually faster?
...looks so C'ish is because it was over 15 years ago.
I'd obviously use std::string and iterators today.)
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Where do “pure virtual function call” crashes come from?
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This can be triggered with MSVC if you add an extra level of indirection: have Base::Base call a non-virtual f() which in turn calls the (pure) virtual doIt method.
– Frerich Raabe
Mar 5 '14 at 14:20
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How do I lowercase a string in C?
How can I convert a mixed case string to a lowercase string in C?
6 Answers
6
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