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t3.c

@@ -0,0 +1,96 @@
+#include <stdio.h>
+typedef struct INFO
+{
+    int num;
+    float Maths;
+    float Physics;
+    float English;
+    float sum;
+    float average;
+}Info;
+Info stu[3];
+void menu();
+void info();
+void grade_sort();
+int main()
+{
+    menu();
+    info();
+    grade_sort();
+}
+void info()
+{
+    for (int i = 0; i < 3; i++)
+    {
+        scanf("%d%f%f%f", &stu[i].num, &stu[i].Maths, &stu[i].Physics, &stu[i].English);
+    }
+}
+void menu()
+{
+    for (int i = 0; i < 30; i++)
+    {
+        printf(" ");
+    }
+    printf("1.Input\n");
+    for (int i = 0; i < 30; i++)
+    {
+        printf(" ");
+    }
+    printf("2.Output\n");
+    for (int i = 0; i < 30; i++)
+    {
+        printf(" ");
+    }
+    printf("3.Order\n");
+    for (int i = 0; i < 30; i++)
+    {
+        printf(" ");
+    }
+    printf("4.Quit\n");
+    char c;
+    scanf("%c", &c);
+    if (c == 'i')
+    {
+        printf("Please input info of the three students:\n");
+    }
+    else if (c == 'o')
+    {
+        printf("You are trying to Output info\n");
+    }
+    else if (c == 'm')
+    {
+        printf("You are trying to Make things ordered\n");
+    }
+    else if (c == 'q')
+    {
+        printf("You are about to Quit\n");
+    }
+    else{
+        printf("Wrong input\n");
+    }
+}
+void grade_sort()
+{
+    for (int i = 0; i < 3; i++)
+    {
+        stu[i].sum = stu[i].Maths + stu[i].Physics + stu[i].English;
+        stu[i].average = stu[i].sum / 3;
+    }
+    for (int i = 0; i < 3; i++)
+    {
+
+        for (int j = 2; j > i; j--)
+        {
+            if (stu[j].sum < stu[j - 1].sum)
+            {
+                Info tmp = stu[j];
+                stu[j] = stu[j - 1];
+                stu[j - 1] = tmp;
+            }
+        }
+    }
+    for (int i = 0; i < 3; i++)
+    {
+        printf("%d,%.1f,%.1f\n", stu[i].num, stu[i].sum, stu[i].average);
+    }
+}