Finished code of question 3.

simmod/ass1/.gitignore

+sum.float
+sum.double
+sum
 speed.*.*
 speed
 fp

simmod/ass1/Makefile

 FLAGS=-Wall -Wextra -std=c99 -pedantic -O0 -lm
-TYPES=float double LD
+SPEED_TYPES=float double LD
+SUM_TYPES=float double
 OPS=ADD DIV MULT SQRT
 
-all: fp speed report.pdf float_double
+all: fp speed report.pdf sum
 
 %.pdf: %.tex
 	pdflatex $^
 	pdflatex $^
 
 speed: speed.c
-	for t in $(TYPES); do \
+	for t in $(SPEED_TYPES); do \
 		for o in $(OPS); do \
 			sed "s#{TYPE}#$$t#" $^ | sed "s#{OP}#$$o#" > speed.$$t.$$o.c; \
 			gcc $(FLAGS) -o speed.$$t.$$o speed.$$t.$$o.c; \
@@ -21,8 +22,13 @@ speed: speed.c
 fp: floating_point.o
 	gcc $(FLAGS) -o $@ $^
 
-float_double: float_vs_double.o
-	gcc $(FLAGS) -o $@ $^
+sum: sum.c
+	for t in $(SUM_TYPES); do \
+		sed "s#{TYPE}#$$t#" $^ > sum.$$t.c; \
+		gcc $(FLAGS) -o sum.$$t sum.$$t.c; \
+		rm sum.$$t.c; \
+	done;
+	touch $@
 
 %.o: %.c
 	gcc $(FLAGS) -o $@ -c $^
@@ -31,4 +37,4 @@ float_double: float_vs_double.o
 	gcc $(FLAGS) -o $* $^
 
 clean:
-	rm -vf *.o *.i *.s fp speed speed.*.* floating_point
+	rm -vf *.o *.i *.s fp speed speed.*.* floating_point sum sum.float sum.double

simmod/ass1/float_vs_double.c → simmod/ass1/sum.c

 #include <stdlib.h>
 #include <stdio.h>
 
-int main(void) {
-    puts("Using type {TYPE}.");
-
-    puts("Forward summation:");
-    printf("N = 1e8: %e\n", sum_forward(1e8));
-    printf("N = 2e8: %e\n", sum_forward(2e8));
-
-    puts("Backward summation:");
-    printf("N = 1e8: %e\n", sum_backward(1e8));
-    printf("N = 2e8: %e\n", sum_backward(2e8));
-
-    return 0;
-}
-
 {TYPE} sum_forward(int N) {
     {TYPE} sum = 0;
 
@@ -32,3 +18,17 @@ int main(void) {
 
     return sum;
 }
+
+int main(void) {
+    puts("Using type {TYPE}.");
+
+    puts("Forward summation:");
+    printf("N = 1e8: %e\n", sum_forward(1e8));
+    printf("N = 2e8: %e\n", sum_forward(2e8));
+
+    puts("Backward summation:");
+    printf("N = 1e8: %e\n", sum_backward(1e8));
+    printf("N = 2e8: %e\n", sum_backward(2e8));
+
+    return 0;
+}