ADD file via upload

4.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <string.h>
+struct student{
+    int clas,inserted;
+    char id[20];
+    double score1,score2,score3,total;
+}s[10];
+
+void input(){
+	int i,j,cnt=0;
+	for(i=0;i<4;i++){
+		scanf("%s%d%lf%lf%lf",s[i].id,&s[i].clas,&s[i].score1,&s[i].score2,&s[i].score3);
+		cnt++;
+		if(i!=3) s[i].inserted=0;
+		else s[i].inserted=1;
+		for(j=0;j<i;j++){
+			if(strcmp(s[i].id,s[j].id)==0){
+				cnt--;
+			}
+		}
+		s[i].total=s[i].score1+s[i].score2+s[i].score3;
+	}
+	for(i=0;i<cnt-1;i++){
+		for(j=0;j<cnt-i-1;j++){
+			if(s[j].clas>s[j+1].clas||(s[j].clas==s[j+1].clas&&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<cnt;i++){
+		printf("%s %d %.1f %.1f %.1f",s[i].id,s[i].clas,s[i].score1,s[i].score2,s[i].score3);
+		if(s[i].inserted==1) printf(" inserted");
+		printf("\n");
+	}
+	
+}
+
+int main(){
+	input();
+	return 0;
+}
+//10001 11 99.5 88.5 89.5
+//10002 12 77.9 56.5 87.5
+//10003 11 92.5 99.0 60.5
+//1004 11 23.4 45.6 99.0