下面是已經編譯,建成併成功一個完整的工作程序運行上的英特爾酷睿2四核至尊運行Windows 7 64位使用Visual Studio已檢索到的信息OP 2015年社區版以特定格式要求,適當地解析了一系列信息或數據,並以請求或要求的格式顯示結果。
stdafx.h中
#ifndef STDAFX_H
#define STDAFX_H
#include <vector>
#include <algorithm>
#include <iterator>
#include <tchar.h>
#include <conio.h>
#include <string>
#include <iostream>
#include <iomanip>
enum ReturnCode {
RETURN_OK = 0,
RETURN_ERROR = 1,
}; // ReturnCode
#endif // STDAFX_H
stdafx.cpp
#include "stdafx.h"
Utility.h
#ifndef UTILITY_H
#define UTILITY_H
class Utility {
public:
static void pressAnyKeyToQuit();
static std::string toUpper(const std::string& str);
static std::string toLower(const std::string& str);
static std::string trim(const std::string& str, const std::string elementsToTrim = " \t\n\r");
static unsigned convertToUnsigned(const std::string& str);
static int convertToInt(const std::string& str);
static float convertToFloat(const std::string& str);
static std::vector<std::string> splitString(const std::string& strStringToSplit, const std::string& strDelimiter, const bool keepEmpty = true);
private:
Utility(); // Private - Not A Class Object
Utility(const Utility& c); // Not Implemented
Utility& operator=(const Utility& c); // Not Implemented
template<typename T>
static bool stringToValue(const std::string& str, T* pValue, unsigned uNumValues);
template<typename T>
static T getValue(const std::string& str, std::size_t& remainder);
}; // Utility
#include "Utility.inl"
#endif // UTILITY_H
Utility.inl
// ----------------------------------------------------------------------------
// stringToValue()
template<typename T>
static bool Utility::stringToValue(const std::string& str, T* pValue, unsigned uNumValues) {
int numCommas = std::count(str.begin(), str.end(), ',');
if (numCommas != uNumValues - 1) {
return false;
}
std::size_t remainder;
pValue[0] = getValue<T>(str, remainder);
if (uNumValues == 1) {
if (str.size() != remainder) {
return false;
}
}
else {
std::size_t offset = remainder;
if (str.at(offset) != ',') {
return false;
}
unsigned uLastIdx = uNumValues - 1;
for (unsigned u = 1; u < uNumValues; ++u) {
pValue[u] = getValue<T>(str.substr(++offset), remainder);
offset += remainder;
if ((u < uLastIdx && str.at(offset) != ',') ||
(u == uLastIdx && offset != str.size()))
{
return false;
}
}
}
return true;
} // stringToValue
Utility.cpp
#include "stdafx.h"
#include "Utility.h"
// ----------------------------------------------------------------------------
// pressAnyKeyToQuit()
void Utility::pressAnyKeyToQuit() {
std::cout << "Press any key to quit" << std::endl;
_getch();
} // pressAnyKeyToQuit
// ----------------------------------------------------------------------------
// toUpper()
std::string Utility::toUpper(const std::string& str) {
std::string result = str;
std::transform(str.begin(), str.end(), result.begin(), ::toupper);
return result;
} // toUpper
// ----------------------------------------------------------------------------
// toLower()
std::string Utility::toLower(const std::string& str) {
std::string result = str;
std::transform(str.begin(), str.end(), result.begin(), ::tolower);
return result;
} // toLower
// ----------------------------------------------------------------------------
// trim()
// Removes Elements To Trim From Left And Right Side Of The str
std::string Utility::trim(const std::string& str, const std::string elementsToTrim) {
std::basic_string<char>::size_type firstIndex = str.find_first_not_of(elementsToTrim);
if (firstIndex == std::string::npos) {
return std::string(); // Nothing Left
}
std::basic_string<char>::size_type lastIndex = str.find_last_not_of(elementsToTrim);
return str.substr(firstIndex, lastIndex - firstIndex + 1);
} // trim
// ----------------------------------------------------------------------------
// getValue()
template<>
float Utility::getValue(const std::string& str, std::size_t& remainder) {
return std::stof(str, &remainder);
} // getValue <float>
// ----------------------------------------------------------------------------
// getValue()
template<>
int Utility::getValue(const std::string& str, std::size_t& remainder) {
return std::stoi(str, &remainder);
} // getValue <int>
// ----------------------------------------------------------------------------
// getValue()
template<>
unsigned Utility::getValue(const std::string& str, std::size_t& remainder) {
return std::stoul(str, &remainder);
} // getValue <unsigned>
// ----------------------------------------------------------------------------
// convertToUnsigned()
unsigned Utility::convertToUnsigned(const std::string& str) {
unsigned u = 0;
if (!stringToValue(str, &u, 1)) {
std::ostringstream strStream;
strStream << __FUNCTION__ << " Bad conversion of [" << str << "] to unsigned";
throw strStream.str();
}
return u;
} // convertToUnsigned
// ----------------------------------------------------------------------------
// convertToInt()
int Utility::convertToInt(const std::string& str) {
int i = 0;
if (!stringToValue(str, &i, 1)) {
std::ostringstream strStream;
strStream << __FUNCTION__ << " Bad conversion of [" << str << "] to int";
throw strStream.str();
}
return i;
} // convertToInt
// ----------------------------------------------------------------------------
// convertToFloat()
float Utility::convertToFloat(const std::string& str) {
float f = 0;
if (!stringToValue(str, &f, 1)) {
std::ostringstream strStream;
strStream << __FUNCTION__ << " Bad conversion of [" << str << "] to float";
throw strStream.str();
}
return f;
} // convertToFloat
// ----------------------------------------------------------------------------
// splitString()
std::vector<std::string> Utility::splitString(const std::string& strStringToSplit, const std::string& strDelimiter, const bool keepEmpty) {
std::vector<std::string> vResult;
if (strDelimiter.empty()) {
vResult.push_back(strStringToSplit);
return vResult;
}
std::string::const_iterator itSubStrStart = strStringToSplit.begin(), itSubStrEnd;
while (true) {
itSubStrEnd = search(itSubStrStart, strStringToSplit.end(), strDelimiter.begin(), strDelimiter.end());
std::string strTemp(itSubStrStart, itSubStrEnd);
if (keepEmpty || !strTemp.empty()) {
vResult.push_back(strTemp);
}
if (itSubStrEnd == strStringToSplit.end()) {
break;
}
itSubStrStart = itSubStrEnd + strDelimiter.size();
}
return vResult;
} // splitString
的main.cpp
#include "stdafx.h"
#include "Utility.h"
int main() {
std::string date;
std::cout << "Enter Date in DD-MM-YY Format.\n" << std::endl;
std::getline(std::cin, date);
std::vector<std::string> vResults = Utility::splitString(date, "-");
std::cout << "\nDate : " << vResults[0] << std::endl
<< "Month: " << vResults[1] << std::endl
<< "Year : " << vResults[2] << std::endl << std::endl;
Utility::pressAnyKeyToQuit();
return 0;
} // main
此實用工具類可能看起來有點過分,在第一,但它是一個非常方便的類來封裝許多字符串操作函數,人們會反覆使用它。這個類不是「對象」類,這意味着你不能創建一個Utility對象的實例,因爲它的構造函數是私有的。但是,所有方法都是靜態的,因此使用它很簡單。只需在需要的地方包含標題並使用範圍解析運算符。此外,如果您有任何預定義的常量字符串,您可以將它們靜態放置在此類的公共部分中,以保持整潔。 –