find the currency in given command line prompt..and the output answer replace currency and then put that place #c symbols

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C++

find the currency symbol in given paragraph on command line prompt..and i trying output answer replace currency put #c symbols.
I trying that one..
in this project i get all functions.i trying create main function for this project.


/////////////////////////////////first function////////////////////////////////////////

static auto checkForCurrency = [](char *&prevPtr, char *&p)->bool
	{
		char *origPrevPtr = prevPtr;
		char *origPtr = p;

		static const unsigned char CentSymbol = 155;
		//static const unsigned char EuroSymbol = ??; //doesn't seem to be an ASCII   char
		static const unsigned char PoundSymbol = 156;
		static const unsigned char YenYuanSymbol = 157;

		bool retVal = false;

		// Modified by Kewei, using symbols instead of ascii code to represent currency
		if (*p == '$' || *p == '€' || *p == '£' || *p == '¥' || *p == '¢') {
			advance(prevPtr, p, 1);
			if (isNumber(prevPtr, p)) {
				retVal = true;
			} else if (*p == TheSpace) {
				char *tmpPtr = p;
				advance(prevPtr, p, 1);
				if (isNumber(prevPtr, p)) {
					retVal = true;
				} else {
					p = tmpPtr;
				}
			}
		} else if(isNumber(prevPtr, p)) {
			if (*p == CentSymbol) {
				advance(prevPtr, p, 1);
				retVal = true;
			} else if (isCurrency(prevPtr, p)) {
				retVal = true;
			} else if (*p == TheSpace) {
				char *tmpPtr = p;
				advance(prevPtr, p, 1);
				if (*p == CentSymbol) {
					advance(prevPtr, p, 1);

					retVal = true;
				} else if(isCurrency(prevPtr, p)) { 
					retVal = true;
				} else {
					p = tmpPtr;
				}
			}
		}

		if (retVal) {
			memset(origPtr, TheSpace, p - origPtr);
			*(origPtr + 0) = '#';
			*(origPtr + 1) = 'c';
		} else {
			prevPtr = origPrevPtr;
			p = origPtr;
		}

		return retVal;
	};

/////////////////////////////////second function////////////////////////////////////////

static auto isCurrency = [](char *&prevPtr, char *&p)->bool
	{
		// Modified by Kewei, added several new currency units
		static const string currencies[] = {  // make sure the longer version is first
			"dollars", "dollar", "cents", "cent",
			"euros", "euro", "yen", "yuan", "pounds", "pound", "pence",
			"usd", "eur", "aud", "cad", "cny",
		};

		for (const string ¤cy : currencies) {
			const string::size_type lenCurrency = currency.length();
			if (strncmp(p, currency.c_str(), lenCurrency) == 0) {
				if (*prevPtr == TheSpace) {
					char *const pEndOfCurrency = p + lenCurrency;
					if (*pEndOfCurrency == TheSpace) {
						advance(prevPtr, p, lenCurrency);
						return true;
					}
				}
			}
		}

		return false;
	};

/////////////////////////////////third function////////////////////////////////////////

static auto isNumber = [](char *&prevPtr, char *&p)->bool
	{
		bool retVal = false;

		if (*p == '-' || *p == '+') {
			advance(prevPtr, p, 1);
			if (isDigit(prevPtr, p)) {
				retVal = true;
				for (;;) {
					while (isDigit(prevPtr, p)) {}
					if (*p == ',') {
						advance(prevPtr, p, 1);
						continue;
					}
					break;
				}
				if (*p == '.') {
					advance(prevPtr, p, 1);
					while (isDigit(prevPtr, p)) {}
					if (*p == 'e') {
						advance(prevPtr, p, 1);
						if (*p == '-' || *p == '+') {
							advance(prevPtr, p, 1);
						}
						while (isDigit(prevPtr, p)) {}
					}
				} else if (*p == 'e') {
					advance(prevPtr, p, 1);
					if (*p == '-' || *p == '+') {
						advance(prevPtr, p, 1);
					}
					while (isDigit(prevPtr, p)) {}
				} else if (*p == '/') {		// Modified by Kewei, added a case for fraction
					advance(prevPtr, p, 1);
					for (;;) {
						while (isDigit(prevPtr, p)) {}
						if (*p == ',') {
							advance(prevPtr, p, 1);
							continue;
						}
						break;
					}
				}
			}
		} else if (isDigit(prevPtr, p)) {
			retVal = true;
			for (;;) {
				while (isDigit(prevPtr, p)) {}
				if (*p == ',') {
					advance(prevPtr, p, 1);
					continue;
				}
				break;
			}
			if (*p == '.') {
				advance(prevPtr, p, 1);
				while (isDigit(prevPtr, p)) {}
				if (*p == 'e') {
					advance(prevPtr, p, 1);
					if (*p == '-' || *p == '+') {
						advance(prevPtr, p, 1);
					}
					while (isDigit(prevPtr, p)) {}
				}
			} else if (*p == 'e') {
				advance(prevPtr, p, 1);
				if (*p == '-' || *p == '+') {
					advance(prevPtr, p, 1);
				}
				while (isDigit(prevPtr, p)) {}
			} else if (*p == '/') {		// Modified by Kewei, added a case for fraction
				advance(prevPtr, p, 1);
				for (;;) {
					while (isDigit(prevPtr, p)) {}
					if (*p == ',') {
						advance(prevPtr, p, 1);
						continue;
					}
					break;
				}
			}
		}

		return retVal;
	};

/////////////////////////////////fourth function////////////////////////////////////////

static auto advance = [](char *&prevPtr, char *&p, const size_t offset)->void
	{
		if (offset == 0) return;  // safety measure
		prevPtr = p + (offset - 1);
		p = prevPtr + 1;
	};

/////////////////////////////////fifth function////////////////////////////////////////

static auto isDigit = [](char *&prevPtr, char *&p)->bool
	{
		if (*p >= '0' && *p <= '9') {  // There is a <ctype> function isdigit(), but it converts char to int
			advance(prevPtr, p, 1);
			return true;
		}
		return false;
	};

};