#include <stdio.h>
#include <math.h>
#include <gsl/gsl_integration.h>

double errorfc(double x);

int main(void){
	for(double x=-3;x<=3;x+=0.1)
		printf("%g %g\n",x,errorfc(x));
	printf("\n\n");
	for(double x=-3;x<=3;x+=0.5)
		printf("%g %g\n",x,erf(x));
return 0;
}