Question

Write a number of C++ functions, and a test driver ( harness ) to test them with.

Functions:

 double radians( double degrees )

 double xCosXySinY( double x, double y )

 int linspace( double data[ ], double dataMin, double delta, int nPoints )

-----Fills data[ ] with nPoints values, starting at dataMin and increasing in steps of delta.

-----Returns the number of array spots filled, ( normally nPoints ), or -1 in the case of errors ( bad input. )

 int linspace( double data[ ], double dataMin, double delta, double dataMax )

-----Fills data[ ] with values, ranging from dataMin to dataMax in steps of delta

-----Returns the number of array spots filled, ( calculated ), or -1 in the case of errors ( bad input. )

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

double radians(double degrees){
   double pi = 2 * asin(1);
   return degrees * pi / 180;
}

double xCosXySinY(double x, double y){
   return (x * sin(radians(x))) + (y * sin(radians(x)));
}

int linspace(double data[], double dataMin, double delta, int nPoints){
   try{
       double val = dataMin;
       for(int i = 0; i < nPoints; ++i){
           data[i] = val;
           val += delta;
       }
       return nPoints;
   }
   catch(int e){
       return -1;
   }
}

int linspace(double data[], double dataMin, double delta, double dataMax){
   try{
       double val = dataMin;
       int count = 0;
       for(double val = dataMin; val <= dataMax; val += delta){
           data[count++] = val;
       }
       return count;
   }
   catch(int e){
       return -1;
   }
}

void printArr(double arr[], int count){
   for(int i = 0; i < count; ++i){
       cout << arr[i] << " ";
   }
   cout << endl;
}

int main(){
   double arr[10], arr1[100];
   linspace(arr, 0, 0.5, 10);
   printArr(arr, 10);
   int count = linspace(arr1, 0, 0.5, 7.5);
   printArr(arr1, count);
   return 0;
}