komplex exercise

exercises/komplex/Makefile

+CC = gcc
+CFLAGS = -O -std=gnu11
+CFLAGS += -Wall
+LDFLAGS = -I.
+LDLIBS = -lm
+
+all: out.txt
+	cat ./$<
+
+out.txt: main
+	./$< > $@
+
+main: main.o komplex.o
+
+main.o komplex.o: komplex.h
+
+clean:
+	$(RM) main main.o komplex.o out.txt
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exercises/komplex/komplex.c

+#include"komplex.h"
+#include<stdio.h>
+
+void komplex_print(char *s, komplex a) {
+	printf("%s (%g,%g)\n",s,a.re,a.im);
+}
+
+komplex komplex_new(double x, double y) {
+	komplex z = {x,y};
+	return z;
+}
+
+void komplex_set(komplex* z, double x, double y) {
+	(*z).re = x;
+	(*z).im = y;
+}
+
+komplex komplex_add (komplex a, komplex b) {
+	komplex result = { a.re + b.re , a.im + b.im };
+	return result;
+}
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exercises/komplex/komplex.h

+#ifndef HAVE_KOMPLEX_H
+#define HAVE_KOMPLEX_H
+
+struct komplex {double re; double im;};
+typedef struct komplex komplex;
+
+void komplex_print(char* s, komplex z);
+void    komplex_set      (komplex* z, double x, double y);
+komplex komplex_new      (double x, double y);
+komplex komplex_add      (komplex a, komplex b);
+komplex komplex_sub      (komplex a, komplex b); 
+
+#endif
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exercises/komplex/main.c

+#include"komplex.h"
+#include"stdio.h"
+#define TINY 1e-6
+
+int main(){
+	komplex a = {1,2}, b = {3,4};
+
+	printf("testing komplex_add...\n");
+	komplex r = komplex_add(a,b);
+	komplex R = {4,6};
+	komplex_print("a=",a);
+	komplex_print("b=",b);
+	komplex_print("a+b should   = ", R);
+	komplex_print("a+b actually = ", r);
+}
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