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I am new to programming and trying to write a new program. While checking through my program it is returning the error code 1.#QNAN. I have tried isolating the variable and researching for answers but cannot find any solutions. My code: // This is a program to decide what culvert should be properly used for a specific installation // using given measurements and data // #include <cstdio> #include <cstdlib> #include <iostream> #include <string> using namespace std; // initializing functions double slope_function(); double cbasin(); // initializing classes: Subdivisions specs //intitializing global variables double edge_road =0; double up_stream =0; double down_stream =0; double tbm =0.0; //double culv_length =0; double slope = 0.0 ; char street_name[1001]; int min_culv = 15; double up_strm_culv =0; double dwn_strm_culv =0; int main (int nNumberofArgs, char* pszArgs[]) { cout<< "This program will allow the surveyor to double check their calculations\n"; cout << "in deciding what size, type, and requirements are allowed for the\n"; cout << "installation of culverts in Terrebonne Parish.\n\n"; // begin input cout << "what is the name of the street\nwhere the culverts will be installed: "; cin.getline (street_name,1000); cout << endl; cout << "What is the Benchmark: "; cin >> tbm; cout << endl; cout << "What is the elevation of the edge of the road: "; cin >> edge_road; cout << endl; cout << "What is the up-stream culvert size: "; cin >> up_strm_culv; cout << endl; cout << "What is the culverts up-stream inverted elevation: "; cin >> up_stream; cout << endl; cout << "What is the down-stream culvert size: "; cin >> dwn_strm_culv; cout << endl; cout << "What is the culverts down-stream inverted elevation: "; cin >

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