/* This is a main routine that will call your function myErf to integrate 
 * the error function as assigned in class */

#include<stdio.h>
#include<stdlib.h>

double myErf(double step, double upper, double lower);

int main(int argc, char * argv[])
{
	double f;
	double step, upper, lower;

	if(argc < 4){
		printf("Usage: %s step_size upper_limit lower_limit\n",argv[0]);
		return 1;
	}
// What you really need to pay attention to here is that argv[0] is the 
// executable name, in my case myErf. Statements like the one above 
// prevent users from creating cases where too little info is offered.

 	step  = strtod(argv[1],NULL);
 	upper = strtod(argv[2],NULL);
 	lower = strtod(argv[3],NULL);
// The last 3 lines convert command line arguments which are 
// strings (arrays of characters really) to double precision numbers
	
	f = myErf(step,upper,lower);

	printf("This is the answer: %lf\n",f);
}

// Below is the function to edit.
double myErf(double step, double upper, double lower)
{
	double value;
	
	return value;
}