如何录入学生信息，搜索学生名，修改成绩，列出成绩表，升序降序排列
#include "stdio.h"
#define NC 100
struct studentRed { //定义学生记录，即对应表格的一行
char studName[20]; //姓名对应第一列的Student Name
char studID[20]; //学号对应第二列的Student ID 用20个字符编码，可用字母做学号
float compProgram; // score for Computer programming 用浮点数可输入小数分数
float physEducat; //score for Computer programming
float commResech; //score for Communication and Research
float averageScore; //average score
}*p,students[NC]={
{"John","zy001",84,86,78,0},
{"Xiaoming","zy002",77,82,90,0},
{"Xiaohua","zy003",79,82,85,0},
{"Jianguo","zy004",84,86,78,0},
{"Xiaodong","zy005",60,55,40,0},
};
void insertAvgScore(struct studentRed *stu,int length){
for (int i = 0; i <length ;++i) {
stu[i].averageScore=(stu[i].compProgram+stu[i].physEducat+stu[i].commResech)/3;
}
}
void printStudentInfo(struct studentRed *stu,int length){
printf("Name\t\tID\t\tComputer\tPhysical\tCommunication\tAverages\n");
for(int i=0;i<length;i++){
printf("%-12s%s",stu[i].studName,stu[i].studID,stu[i].compProgram,stu[i].physEducat,stu[i].commResech,stu[i].averageScore);
}
}
int main(){
insertAvgScore(students,5);
printStudentInfo(students,5);
return 0;
}
这是输入一个的
#include "stdio.h"
#define NC 100
struct studentRed //定义学生记录，即对应表格的一行
{
char studName[20]; //姓名对应第一列的Student Name
char studID[20]; //学号对应第二列的Student ID 用20个字符编码，可用字母做学号
float compProgram; // score for Computer programming 用浮点数可输入小数分数
float physEducat; //score for Computer programming
float commResech; //score for Communication and Research
float averageScore; //average score
}*p,students[NC]=
{
{"John","zy001",84,86,78,0},
{"Xiaomin","zy002",77,82,90,0},
{"Xiaohua","zy003",79,82,85,0},
{"Jianguo","zy004",84,86,78,0},
{"Xiaodon","zy005",60,55,40,0},
};
void insertAvgScore(struct studentRed *stu,int length)
{
for (int i = 0; i <length ; ++i)
{
stu[i].averageScore=(stu[i].compProgram+stu[i].physEducat+stu[i].commResech)/3;
}
}
void printStudentInfo(struct studentRed *stu,int length)
{
printf("Name\tID\tComputer\tPhysical\tCommunication\tAverages\n");
for(int i=0; i<length; i++)
{
printf("%s\t%s\t%.2f\t%.2f\t%.2f\t%.2f\n",stu[i].studName,stu[i].studID,stu[i].compProgram,stu[i].physEducat,stu[i].commResech,stu[i].averageScore);
}
}
void input(struct studentRed *stu,int i)
{
//for(int i=0; i<length; i++)
{
scanf("%s",stu[i].studName);
getchar();
scanf("%s",stu[i].studID);
scanf("%f%f%f",&stu[i].compProgram,&stu[i].physEducat,&stu[i].commResech);
}
}
int main()
{
insertAvgScore(students,5);
printStudentInfo(students,5);
input(students,5);
printStudentInfo(students,6);
return 0;
}
#include<stdio.h>
#include<string.h>
struct grade_list{ //定义结构体
char name[10]; //姓名
float c_len; //C语言成绩
float math; //高数
float eng; //英语
float PE; //体育
};
void in_put(struct grade_list grades[], int n); //声明输入函数
void average(struct grade_list grades[], int n); //声明平均值函数
void average_subject(struct grade_list grades[], int n);//声明课程平均值函数
void find(struct grade_list grades[], int n); //声明查询函数
void change(struct grade_list grades[], int n); //声明修改成绩函数
int main()
{
struct grade_list grades[50];
int choices,i,n;
printf("成绩统计系统正在启动...\n");
printf("程序正在运行...\n");
do{
rerun:
printf("\n");
printf("\t************************************\n");
printf("\t* =========================== *\n");
printf("\t* 学生成绩统计系统 *\n");
printf("\t* =========================== *\n");
printf("\t* *\n");
printf("\t* 输入学生成绩---------1 *\n");
printf("\t* 查看学生平均成绩-----2 *\n");
printf("\t* 查看课程平均值-------3 *\n");
printf("\t* 查找学生成绩---------4 *\n");
printf("\t* 修改学生成绩---------5 *\n");
printf("\t* 退出系统-------------0 *\n");
printf("\t* *\n");
printf("\t************************************\n");
printf("\t请选择功能：");
scanf("%d", &choices);
switch(choices)
{
case 1:
printf("执行成绩输入程序...\n\n");
printf("\t请输入学生人数（1~50）：");
scanf("%d",&n);
in_put(grades,n);
break;
case 2:
printf("执行学生平均成绩计算程序...\n\n");
average(grades,n);
break;
case 3:
printf("执行学科平均成绩计算程序...\n\n");
average_subject(grades,n);
break;
case 4:
printf("执行成绩查询程序...\n\n");
find(grades, n);
break;
case 5:
printf("执行成绩修改程序...\n\n");
change(grades, n);
break;
case 0:
printf("\t||系统已关闭，感谢您的使用！||");
break;
default :
printf("\t非法输入!!!");
goto rerun;
}
}while(choices>0&&choices<6);
return 0;
}
void in_put(struct grade_list grades[], int n) //定义输入函数
{
int i;
for(i=0;i<n;i++)
{
printf("\t请输入第%d名同学的姓名：", i+1);
scanf("%s", grades[i].name);
printf("\t请输入第%d名同学的C语言成绩：", i+1);
scanf("%f", &grades[i].c_len);
printf("\t请输入第%d名同学的高数成绩：", i+1);
scanf("%f", &grades[i].math);
printf("\t请输入第%d名同学的英语成绩：", i+1);
scanf("%f", &grades[i].eng);
printf("\t请输入第%d名同学的体育成绩：", i+1);
scanf("%f", &grades[i].PE);
}
printf("\t*成绩录入成功*\n");
}
void average(struct grade_list grades[], int n) //定义计算学生平均值
{
int i;
float result;
for(i=0;i<n;i++)
{
result=(grades[i].c_len+grades[i].math+grades[i].eng
+grades[i].PE)/4;
printf("\t%s的平均成绩为%.2f\n",grades[i].name, result);
}
}
void average_subject(struct grade_list grades[], int n) //定义计算学科平均分
{
printf("\tC语言\t高数\t英语\t体育\n");
int i;
float result=0.0;
for(i=0;i<n;i++)
{
result+=grades[i].c_len;
}
printf("\t%.2f", result/n);
result=0;
for(i=0;i<n;i++)
{
result+=grades[i].math;
}
printf("\t%.2f", result/n);
result=0;
for(i=0;i<n;i++)
{
result+=grades[i].eng;
}
printf("\t%.2f", result/n);
result=0;
for(i=0;i<n;i++)
{
result+=grades[i].PE;
}
printf("\t%.2f\n", result/n);
}
void find(struct grade_list grades[], int n) //定义循环成绩查询函数
{
int i,trigger;
char in_name[10];
do{
printf("\t请输入要查询的学生姓名：");
scanf("%s", in_name);
int chack=0;
for(i=0;i<n;i++)
{
if(strcmp(in_name,grades[i].name)==0)
{
printf("\t%s的成绩为：\n\n",grades[i].name);
printf("\tC语言\t高数\t英语\t体育\n");
printf("\t%.2f\t%.2f\t%.2f\t%.2f\n\n", grades[i].c_len,grades[i].math,grades[i].eng,grades[i].PE);
chack=1;
}
}
if(chack==0) printf("\t*查无此人*\n\n");
printf("\t继续查询请输入1，否则输入0返回功能选择界面：");
scanf("%d", &trigger);
}while(trigger==1);
}
void change(struct grade_list grades[], int n) //定义成绩修改函数
{
int i,trigger;
char ch_name[10];
do{
int chack=0;
printf("\t请输入要修改成绩的学生姓名：");
scanf("%s", ch_name);
for(i=0;i<n;i++)
{
if(strcmp(ch_name,grades[i].name)==0)
{
printf("\t请输入该同学修改后的成绩：\n\tC语言：");
scanf("%f", &grades[i].c_len);
printf("\t高数：");
scanf("%f", &grades[i].math);
printf("\t英语：");
scanf("%f", &grades[i].eng);
printf("\t体育：");
scanf("%f", &grades[i].PE);
chack=1;
printf("\t*修改成功*\n");
}
}
if(chack==0) printf("\t*查无此人*\n\n");
printf("\t继续修改请输入1，否则输入0返回功能选择界面：");
scanf("%d", &trigger);
}while(trigger==1);
}