genVectorAdd
in genMath.lib

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Sample Code

int genVectorAdd(
                                        float *VectorA,       // pointer to array holding vector A
                                        float *VectorB,       // pointer to array holding vector B
                                        int dimen,                // dimension of vectors A and B
                                        float *VectorSum)  // pointer to store resultant vector

This function adds two vectors of dimension n:

Resultant(i)  = a(i) + b(i)

The explicit routines VectorAdd2d and VectorAdd3d are faster due to code
optimizations in the explicit algorithms..

The return code is errno, defined in the C standard library (math.h).  This is an integer value
for math errors.

 
Sample Application:
/////////// splgnAdd.c for genVectorAdd Library Function /////////////
//								    //
//	For this sample, 3-d vectors are used.  Vectors are stored  //
//	in arrays a and b, and the sum is returned into	    	    //
//	the array c.						    //
//								    //
//////////////////////////////////////////////////////////////////////

//////////////////////////// INCLUDES ////////////////////////////////

#include "stdio.h"
#include "genMath.h"

////////////////////////////// MAIN //////////////////////////////////
void main()
{

	//local declarations
	//integers
	int i;			// dimension counter
	int retcode;		// return code for call to genVectorAdd

	//floats
	float a[3];				// vector A
	float b[3];				// vector B
	float c[3];				// resultant vector, C

	//character strings
	char  ch;				//input string to exit

	//intialize the A and B vectors
	a[0] = (float)1.234;
	a[1] = (float)-.678;
	a[2] = (float)10.3;

	b[0] = (float)4.559;
	b[1] = (float)3.24;
	b[2] = (float)0.3422;

	//compute the vector sum
	retcode = genVectorAdd(a,b,3,c);
	
	//display the result
	
	printf("%s", "Resultant Components: \n\n");

	for(i=0;i<=2;++i){
	
		printf("%s%d%s%f%s", "c[",i,"] = ", c[i],"\n");
	
	}

	printf("%s","\n");

	//display closing message and wait for <enter> before exiting
	printf("Press <Enter> to end");
	scanf("%c", &ch);

} // End Main

/////////////////////////////// End splgnAdd.c ///////////////////////
The reader may compute the vector sum of A and B and compare
to the output of the sample program.
Output from the test program splgenDP.c: 
Resultant Components:
c[0] = 5.793000
c[1] = 2.562000
c[3] = 10.642200