Latex exercise

exercises/latex/Makefile

+CFLAGS = -Wall -O1 -std=gnu11
+LDLIBS = -lm
+
+ms.pdf: ms.tex exp-gpl.tex Makefile
+	pdflatex $<
+	pdflatex $<
+#	bibtex $< Hvis bibtex bruges
+#	pdflatex $<
+
+out.data.txt: main
+	./$< > ./$@
+
+exp-gpl.tex: out.data.txt
+	echo '\
+	set terminal latex rotate;\
+	set output "$@";\
+	set size 0.8,0.9;\
+	set key top left;\
+	set tics out;\
+	set xlabel "x";\
+	set ylabel "Exp(x)";\
+	set title "Exponential functions";\
+	plot\
+	"$<" using 1:2 with line title "Exp from math.h",\
+	"$<" using 1:3 with line title "Homemade exp";\
+	' | gnuplot
+	
+.PHONEY: clean
+clean:
+	$(RM) exp-gpl.tex ms.aux ms.log ms.pdf main out.data.txt
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exercises/latex/main.c

+#include<math.h>
+#include<stdio.h>
+
+double ex(double x){
+	if(x<0)return 1/ex(-x);
+	if(x>1./8)return pow(ex(x/2),2);
+return 1+x*(1+x/2*(1+x/3*(1+x/4*(1+x/5*(1+x/6*(1+x/7*(1+x/8*(1+x/9*(1+x/10)))))))));
+}
+
+int main() {
+	for(double x=1./16;x<8;x+=1./16) {
+		printf("%g %g %g\n",x,exp(x),ex(x));
+	}
+return 0;
+}
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