#include
#include
#define maxsize 5
struct student {
int num;
char name[30];
int english,computer,math,chinese;
int rank;
};
static float aen,aco,ama,ach;static int maxch,maxma,maxen,maxco,minch,minma,minen,minco,sum[5];
void menu (struct student students []);
void input_student (struct student students []);
void change_student (struct student *p);
void search_student (struct student *p);
void cal (struct student s[]);
void max (struct student s[]);
void min (struct student s[]);
void sort (struct student students[]);
void output_student (struct student students []);
void input_student (struct student students [])
{
int i;char ch;
for (i=0;i<5;i++){
printf("********************************\n");
printf("请输入：\n学号:");
scanf("%d",&students [i].num);
printf("姓名:");
scanf("%s",students [i].name);
printf("英语:");
scanf("%d",&students [i].english);
printf("计算机:");
scanf("%d",&students [i].computer);
printf("语文:");
scanf("%d",&students [i].math);
printf("数学:");
scanf("%d",&students [i].chinese);
printf("是否继续？（Y/N）________________:\n");
scanf("%c",&ch);
if (ch==('N'||'n')) break;}
return;
}
void output_student (struct student students [ ])
{
int i,a,b,j;int sum[5];
printf ("---------------------------------------------------------------------------\n");
printf ("num\t name\t english\t computer\t math\t chinese\t rank\n");
for (i=0;i<5;i++){
printf("%d\t",students [i].num);
printf(" %s\t",students [i].name);
printf(" %d\t",students [i].english);
printf(" %d\t",students [i].computer);
printf(" %d\t",students [i].math);
printf(" %d\t",students [i].chinese);
printf(" %d\t\n",students [i].rank);}
printf("平均分 %.2f\t%.2f\t%.2f\t%.2f\n",aen,aco,ama,ach);
printf("最高分 %d\t%d\t%d\t%d\n",maxen,maxco,maxma,maxch); /*分数的调用*/
printf("最低分 %d\t%d\t%d\t%d\n",minen,minco,minma,minch);
printf ("---------------------------------------------------------------------------");
return ;
}
void search_student (struct student students [ ] )
{
int i,cour,way,j;
char a[20];
printf("choice the way:1.姓名2.课程3.总分名次");
scanf("%d",&way);
switch(way){
case 1:
printf("姓名:");
scanf("%s",&a);
for (i=0;i<5;i++){
if (strcmp(students[i].name,a)==0) { /*逐个比较相等为0 ,不等返回不相等的差值 !strcmp(students[i].name, a)*/
printf(" num:%d",students [i].num);
printf(" english:%d",students [i].english);
printf(" computer:%d",students [i].computer);
printf(" math:%d",students [i].math);
printf("chinese:%d\n",students [i].chinese);}
}
case 2:printf("课程:");
printf("a-英语,b-计算机,c-数学,d-语文:");
scanf("%c",&cour);
if(cour=='a') {
printf(" 英语:");
for (i=0;i<5;i++) printf(" %d",students [i].english);
if(i==4) {
printf("平均分: %f",&aen);
printf(" 最高分:%d",&maxen);
printf("最低分: %d",&minen);}
}
if(cour=='b') {
printf(" 计算机:");
for (i=0;i<5;i++) printf(" %d",students [i].computer);
if(i==4) {
printf("平均分: %f",&aco);
printf(" 最高分:%d",&maxco);
printf("最低分: %d",&minco);}
}
if(cour=='c') {
printf(" 数学:");
for (i=0;i<5;i++) printf(" %d",students [i].math);
if(i==4) {
printf("平均分: %f",&ama);
printf(" 最高分:%d",&maxma);
printf("最低分: %d",&minma);}
}
if(cour=='d') {
printf("语文:");
for (i=0;i<5;i++) printf(" %d",students [i].chinese);
if(i==4) {
printf("平均分: %f",&ach);
printf(" 最高分:%d",&maxch);
printf("最低分: %d",&minch);}
}
case 3:for (j=1;j<6;j++)
for (i=0;i<5;i++)
if(students [i].rank==j) printf(" name:%s",students [i].name);
return;
}
}
void sort (struct student students[]){
int i,j,x;x=1;
for(i=0;i<5;i++)
for(j=1;i<6;i++)
if(sum[i]<sum[i+1])
{x=x+1;
students[i].rank=x;
}
return;
}
void max (struct student students []){
int i;
maxch=students [0].chinese;
maxma=students [0].math;
maxen=students [0].english;
maxco=students [0].computer;
for (i=0;i if (students [i].chinese>students [i+1].chinese){
maxch=students [i+1].chinese;}
if (students [i].math>students [i+1].math){
maxma=students [i+1].math;}
if (students [i].english>students [i+1].english){
maxen=students [i+1].english;}
if (students [i].computer>students [i+1].computer){
maxco=students [i+1].computer;}
}
return;
}
void min (struct student students []){
int i;
minch=students [0].chinese;
minma=students [0].math;
minen=students [0].english;
minco=students [0].computer;
/*各科最低*/
for (i=0;i<5;i++) {
if(students [i].chinese<students [i+1].chinese)
maxch=students [i+1].chinese;
if (students [i].math<students [i+1].math)
maxma=students [i+1].math;
if (students [i].english<students [i+1].english)
maxen=students [i+1].english;
if (students [i].computer<students [i+1].computer)
maxco=students [i+1].computer;}
return;
}
void change_student (struct student *p)
{
int num,course,score,i;
printf("输入学号:");
scanf("%d",&num);
printf("choice the course:1.english2.computer3.math4.chinese:");
scanf("%d",&course);
printf("输入新成绩:");
scanf("%d",&score);
for (i=0;i
if(p->num==num)
break;
if(i
switch(course)
{
case 1:p->english=score;break;
case 2:p->computer=score;break;
case 3:p->math=score;break;
case 4:p->chinese=score;break;
}
return;
}
int main (void){
struct student students[maxsize];
int c;
while (1){
printf("********************************\n");
printf(" 学生成绩管理系统\n");
printf("********************************\n");
printf(" （1）输入学生成绩\n");
printf(" （2）查询学生成绩\n");
printf(" （3）修改学生成绩\n");
printf(" （4）输出学生成绩\n");
printf(" （5） 退出系统\n");
printf("请选择（1、2、3、4、5）______\n");
scanf("%d",&c);
if (c>5||c<0)
printf("error\n");
else
switch(c)
{
case 1:input_student (students);break;
case 2:search_student (students);break;
case 3:change_student (students);break;
case 4:output_student (students) ;
break;
case 5:break;
}
if (c==5) break;
}
return 0;
}
出现三个问题，第一，input 函数里yes or no 的选择不出现，第二，总分排须有问题，第三，我自定义函数里计算的值无法输出，不知道该怎么调用定义的cal,max,min.
求大神门帮助阿，用的是dev c++写的。
