ADD file via upload

3.c

@@ -0,0 +1,67 @@
+#include <stdio.h>
+struct student{
+    int clas;
+    char id[20];
+    double score1,score2,score3,total,aver;
+}s[10];
+
+void input(){
+    int i,j;
+	for(i=0;i<3;i++){
+		scanf("%s%lf%lf%lf",s[i].id,&s[i].score1,&s[i].score2,&s[i].score3);
+		s[i].total=s[i].score1+s[i].score2+s[i].score3;
+		s[i].aver=s[i].total/3;
+	}
+	for(i=0;i<2;i++){
+		for(j=0;j<2;j++){
+			if(s[j].total>s[j+1].total){
+				struct student t;
+				t=s[j];
+				s[j]=s[j+1];
+				s[j+1]=t;
+			}
+		}
+	}
+	for(i=0;i<3;i++){
+		printf("%s,%.1f,%.1f\n",s[i].id,s[i].total,s[i].aver);
+	}
+	
+}
+
+int main(){
+    char c;
+    while(1){
+        printf("                              1.Input\n");
+        printf("                              2.Output\n");
+        printf("                              3.Order\n");
+        printf("                              4.Quit\n");
+        scanf(" %c",&c);
+        if(c=='i'){
+        	printf("Please input info of the three students:\n");
+        	input();
+		}
+		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");
+			break;
+		}
+		else printf("Wrong input\n");
+    }
+    return 0;
+}
+//i
+//10001
+//85.0
+//99.0
+//77.5
+//10002
+//88.5
+//88.5
+//90.0
+//10003
+//66.0
+//78.5
+//89.5
+//m
+//q