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171 lines
2.9 KiB
171 lines
2.9 KiB
#include<stdio.h>
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#include<string.h>
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#include<stdlib.h>
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int N=0;
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void menu();
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struct stu_info
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{
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int cls,flag;
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char name[10],num[10];
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float maths,physics,english;
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}
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stu[20];
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void output()
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{
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int i;
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for(i=0;i<N;i++)
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printf("%s %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].maths,stu[i].physics,stu[i].english);
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}
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void sort(struct stu_info *stu,int n)
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{
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int i,j;
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struct stu_info tmp;
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for(i=0;i<n;i++)
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{
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for(j=0;j<n-i-1;j++)
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{
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if(((stu+j)->cls>(stu+j+1)->cls)||((stu+j)->cls==(stu+j+1)->cls)&&((stu+j)->num>(stu+j+1)->num))
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{
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tmp = *(stu+j);
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*(stu+j) = *(stu+j+1);
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*(stu+j+1) = tmp;
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}
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}
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}
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return;
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}
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void input()
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{
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int i;
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char y[5];
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for(i=0;;i++)
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{
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printf("Id ");scanf("%s",stu[i].num);
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printf("class ");scanf("%d",&stu[i].cls);
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printf("name ");scanf("%s",stu[i].name);
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printf("score1 ");scanf("%f",&stu[i].maths);
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printf("score2 ");scanf("%f",&stu[i].physics);
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printf("score3 ");scanf("%f",&stu[i].english);
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printf("Continue?\n");
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again1:
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scanf("%s",y);
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if(strcmp(y,"yes")==0) continue;
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else if(strcmp(y,"no")==0)
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{
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N=i+1;
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menu();
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break;
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}
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else
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{
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printf("wrong input\n");
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goto again1;
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}
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}
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}
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void del(struct stu_info* stu)
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{
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char key[10];char y[5];
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scanf("%s",key);
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int i;
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for (i=0;i<N;i++)
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{
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if(strcmp((stu+i)->num,key)==0||strcmp((stu+i)->name,key)==0)
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{
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N--;
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for(int j=i;j<N;j++)
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{
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*(stu+j)=*(stu+j+1);
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}
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}
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}
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output();
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printf("Continue?\n");
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again2:
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scanf("%s",y);
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if(strcmp(y,"yes")==0) del(stu);
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else if(strcmp(y,"no")==0)
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{
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N=i;
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menu();
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}
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else
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{
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printf("wrong input\n");
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goto again2;
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}
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}
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void sel(struct stu_info* stu)
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{
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char key[10];char y[5];int e=1,i;
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scanf("%s",key);
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for (i=0;i<N;i++)
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{
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if(strcmp((stu+i)->num,key)==0||strcmp((stu+i)->name,key)==0)
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{
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e=0;
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printf("%s %d %s %.1f %.1f %.1f\n",stu[i].num,stu[i].cls,stu[i].name,stu[i].maths,stu[i].physics,stu[i].english);
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}
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}
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if(e) printf("there is no eligible student\n");
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printf("Continue?\n");
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again3:
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scanf("%s",y);
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if(strcmp(y,"yes")==0) sel(stu);
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else if(strcmp(y,"no")==0)
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{
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menu();
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}
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else
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{
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printf("wrong input\n");
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goto again3;
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}
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}
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void order()
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{
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sort(stu,N);
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output();
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menu();
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}
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void menu()
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{
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int in;
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printf("1.input\n");
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printf("2.delete\n");
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printf("3.select\n");
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printf("4.order\n");
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printf("5.output\n");
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printf("6.quit\n");
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printf("please input your option\n");
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scanf("%d",&in);
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switch(in)
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{
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case(1):
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input();
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break;
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case(2):
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del(stu);
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break;
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case(3):
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sel(stu);
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break;
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case(4):
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order();
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break;
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case(5):
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output();
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menu();
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break;
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case(6):
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exit(0);
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default:
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printf("Wrong input\n");
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}
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}
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int main()
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{
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menu();
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return 0;
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}
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