double getSales(string line)
{
		string num;
		double sales;

		for(int index=0; index<=35; index++)
		{
			if(isdigit(line[index]) || (char)line[index]=='.') num+=(char)line[index];
		}

	sales=atof(num);
	return sales;
}


error:
SWICompanySales.cpp: In function `double getSales(std::string)':
SWICompanySales.cpp:120: error: cannot convert `std::string' to `const char*' for argument `1' to `double atof(const char*)'
rhune[hw9]$ c++ SWICompanySales.cpp -o SWISCompany
SWICompanySales.cpp: In function `double getSales(std::string)':
SWICompanySales.cpp:121: error: cannot convert `std::string' to `const char*' for argument `1' to `double atof(const char*)'