Update README.md

README.md

@@ -1,3 +1,37 @@
+第1步骤
+#include<stdio.h>
+int main(){
+	char ch;
+	int i; 
+	for(i=1;i<=30;i++)
+	printf(" ");
+	printf("1.Input\n");
+	 for(i=1;i<=30;i++)
+	printf(" ");
+	printf("2.Output\n");
+	for(i=1;i<=30;i++)
+	printf(" ");
+	printf("3.Order\n");
+	for(i=1;i<=30;i++)
+	printf(" ");
+	printf("4.Quit\n");
+	scanf("%c",&ch);
+	if(ch=='i'){
+		printf("You are trying to Input info\n");
+	}
+	else if(ch=='o'){
+		printf("You are trying to Onput info\n");
+	}
+	else if(ch=='m'){
+		printf("You are trying to Make things ordered\n");
+	}
+	else if(ch=='q'){
+		printf("You are about to Quit\n");
+	}
+	else{
+		printf("Wrong input");
+	}
+}
 第2步骤
 #include<stdio.h>
 int main()
@@ -26,6 +60,95 @@ int main()
     printf("\n");
 	return 0;
 }
+第3步骤
+#include<stdio.h>
+int main(){
+	char ch;
+	int i; 
+	for(i=1;i<=30;i++)
+	printf(" ");
+	printf("1.Input\n");
+	 for(i=1;i<=30;i++)
+	printf(" ");
+	printf("2.Output\n");
+	for(i=1;i<=30;i++)
+	printf(" ");
+	printf("3.Order\n");
+	for(i=1;i<=30;i++)
+	printf(" ");
+	printf("4.Quit\n");
+	scanf("%c",&ch);
+	if(ch=='i'){
+		printf("Please input info of the three students:\n");
+	}
+	else if(ch=='o'){
+		printf("You are trying to Onput info\n");
+	}
+	else if(ch=='m'){
+		printf("You are trying to Make things ordered\n");
+	}
+	else if(ch=='q'){
+		printf("You are about to Quit\n");
+	}
+	else{
+		printf("Wrong input");
+	}
+	struct student{
+	    int num;
+		float math;
+		float phy;
+		float eng;
+	}stu[3];
+	for(i=0;i<3;i++){
+		scanf("%d%f%f%f",&stu[i].num,&stu[i].math,&stu[i].phy,&stu[i].eng);
+	}
+     float sum[3],aver[3];
+     for(i=0;i<3;i++){
+     	sum[i]=stu[i].math+stu[i].phy+stu[i].eng;
+     	aver[i]=sum[i]/3;
+	 }
+	 float n[3];
+	 int j;
+	 n[0]=(sum[0]>sum[1]?sum[0]:sum[1]);
+	 n[0]=(n[0]>sum[2]?n[0]:sum[2]);
+	 if(n[0]==sum[0]){
+	 	if(sum[1]>sum[2])
+	 	{n[1]=sum[1];
+	 	n[2]=sum[2];
+		 }
+		 else if(sum[2]>sum[1]){
+		 	n[1]=sum[2];
+		 	n[2]=sum[1];
+		 }
+	 }
+	 else if(n[0]==sum[1]){
+	 	if(sum[0]>sum[2]){
+	 		n[1]=sum[0];
+	 		n[2]=sum[2];
+		 }
+		 else if(sum[2]>sum[0]){
+		 	n[1]=sum[2];
+		 	n[2]=sum[0];
+		 }
+	 }
+     else if(n[0]==sum[2]){
+     	if(sum[0]>sum[1]){
+     		n[1]=sum[0];
+     		n[2]=sum[1];
+		 }
+		 else if(sum[1]>sum[0]){
+		 	n[1]=sum[1];
+		 	n[2]=sum[0];
+		 }
+	 }
+	 for(i=2;i>=0;i--){
+	 	for(j=0;j<3;j++){
+	 		if(n[i]==sum[j])
+	 			printf("%d,%.1f,%.1f\n",stu[j].num,sum[j],aver[j]);
+		 }
+	 }
+    return 0;
+}
 第4步骤
 #include<stdio.h>
 typedef struct {