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2.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+
+struct Data
+{
+	int ID;
+	float score1;
+	float score2;
+	float score3;
+} stu[1001];
+int stl = 0;
+
+float total(struct Data* a) {
+	return a->score1 + a->score2 + a->score3;
+}
+
+void swap(struct Data* a, struct Data* b) {
+	struct Data t = *a;
+	*a = *b;
+	*b = t;
+}
+
+void input1() {
+	scanf("%d", &stu[stl].ID);
+	scanf("%f", &stu[stl].score1);
+	scanf("%f", &stu[stl].score2);
+	scanf("%f", &stu[stl].score3);
+	stl++;
+}
+
+void Question1() {
+	printf("Please input info of three students:\n");
+	input1();input1();input1();
+	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-3].ID, stu[stl-3].score1, stu[stl-3].score2, stu[stl-3].score3, total(&stu[stl-3]));
+	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-2].ID, stu[stl-2].score1, stu[stl-2].score2, stu[stl-2].score3, total(&stu[stl-2]));
+	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-1].ID, stu[stl-1].score1, stu[stl-1].score2, stu[stl-1].score3, total(&stu[stl-1]));
+
+}
+
+void Typein()
+{
+	scanf("%d", &stu[stl].ID);
+	scanf("%f", &stu[stl].score1);
+	scanf("%f", &stu[stl].score2);
+	scanf("%f", &stu[stl].score3);
+	stl++;
+}
+
+int main() {
+	Typein();
+	Typein();
+	Typein();
+	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-3].ID, stu[stl-3].score1, stu[stl-3].score2, stu[stl-3].score3, total(&stu[stl-3]));
+	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-2].ID, stu[stl-2].score1, stu[stl-2].score2, stu[stl-2].score3, total(&stu[stl-2]));
+	printf("%d  %2.1f  %2.1f  %2.1f  %.1f\n", stu[stl-1].ID, stu[stl-1].score1, stu[stl-1].score2, stu[stl-1].score3, total(&stu[stl-1]));
+
+}