The example of this paper is to share the specific code of C language student performance management system for your reference. The specific content is as follows
Ps: I added a linked list to sort and wrote it in bubbles.
/*
Title : Student's score management system
Author: nyist_xiaod
Date : 2012.5.8
*/
#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <stdlib.h>
#define Print_Head_Num puts(" The class The name Chinese language and literature mathematics English Total grade ")
#define Print_Head_Cla puts(" Student id The name Chinese language and literature mathematics English Total grade ")
#define Print_Head_All puts(" The class Student id The name Chinese language and literature mathematics English Total grade ")
typedef struct Node Node;
struct Score
{
int chinese,math,english,sum;
};
struct Node
{
char name[20],classs[20],number[20];
struct Score score;
struct Node* next;
}*head,*u,*p,*q;
int n,C,M,E,Cj,Cy,Mj,My,Ej,Ey;
char num[20];
void Welcome()
{
printf("\t\t %c %c %c %c %c %c %c %c %c %c %c %c %c %c %c %c %c\n",4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4);
printf("\t\t %c Welcome to the student grade management system %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 1. Read the file %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 2. Save the file %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 3. Add student grades %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 4. Revise students' grades %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 5. Delete student grades %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 6. Enquiry of my grades %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 7. Check the grades of the class %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 8. Check school grades %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c 9. Exit management system %c\n",4,4);
printf("\t\t %c %c\n",4,4);
printf("\t\t %c %c %c %c %c %c %c %c %c %c %c %c %c %c %c %c %c\n\n",4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4);
printf("\t\t Please enter the instruction :(1-9) ");
}
Node* new_node(Node* uu)
{
uu = (Node*)malloc(sizeof(Node));
uu->next = NULL;
return uu;
}
void Add()
{
u = new_node(u);
printf("\n Please enter the information of the student you want to join :\n");
printf("\n The name : ");
scanf("%s",u->name);
printf("\n The class : ");
scanf("%s",u->classs);
printf("\n Student id : ");
scanf("%s",u->number);
printf("\n Chinese, math and English : ");
scanf("%d%d%d",&u->score.chinese,&u->score.math,&u->score.english);
u->score.sum = u->score.chinese + u->score.math + u->score.english;
u->next = head->next;
head->next = u;
printf("\n---> Add a success !\n");
}
void Mod()
{
n = 0;
printf("\n Please enter the student number you want to modify : ");
scanf("%s",num);
for(u = head; u != NULL;u = u->next)
{
if(strcmp(u->number,num) == 0)
{
n = 1;
printf("\n Please enter your new Chinese, maths and English scores : ");
scanf("%d%d%d",&u->score.chinese,&u->score.math,&u->score.english);
u->score.sum = u->score.chinese + u->score.math + u->score.english;
printf("\n---> Modify the success !\n");
break;
}
}
if(!n)
printf("\n---> There is no information about the student !\n");
}
void Del()
{
n = 0;
printf("\n Please enter the student number you want to delete : ");
scanf("%s",num);
for(u = head; u != NULL;u = u->next)
{
if(strcmp(u->number,num) == 0)
{
n = 1;
p->next = u->next;
free(u);
printf("\n---> Delete the success !\n");
break;
}
p = u;
}
if(!n)
printf("\n---> There is no information about the student !\n");
}
void Sort()
{
int i,j;
n = 0;
for(u = head->next; u != NULL;u = u->next)
n++;
for(i=1;i<=n;i++)
{
u = head;
for(j=0;j<n-i;j++)
{
p = u->next;
q = p->next;
if(strcmp(p->classs,q->classs) > 0 || strcmp(p->classs,q->classs) == 0 && p->score.sum < q->score.sum)
{
u->next = q;
p->next = q->next;
q->next = p;
}
u = u->next;
}
}
}
void Que_One()
{
n = 0;
printf("\n Please enter the student number of the student you want to query : ");
scanf("%s",num);
for(u = head->next; u != NULL;u = u->next)
{
if(strcmp(u->number,num) == 0)
{
n = 1;
printf("\n");
Print_Head_Num;
printf("%-11s%-15s",u->classs,u->name);
printf("%-6d%-6d%-6d%-6d\n",u->score.chinese,u->score.math,u->score.english,u->score.sum);
break;
}
}
if(!n)
printf("\n---> There is no information about the student !\n");
}
void Analyze_Sco(Node *uu)
{
C += uu->score.chinese;
M += uu->score.math;
E += uu->score.english;
if(uu->score.chinese >= 60)
Cj++;
if(uu->score.chinese >= 90)
Cy++;
if(uu->score.math >= 60)
Mj++;
if(uu->score.math >= 90)
My++;
if(uu->score.english >= 60)
Ej++;
if(uu->score.english >= 90)
Ey++;
}
void Print_Sco()
{
printf(" Language average : %-6.2f, pass : %%%-6.2f , proficiency : %%%-6.2f.\n\n",(float)C/n,(float)100*Cj/n,(float)100*Cy/n);
printf(" Math gpa : %-6.2f, pass : %%%-6.2f , proficiency : %%%-6.2f.\n\n",(float)M/n,(float)100*Mj/n,(float)100*My/n);
printf(" Average score in English : %-6.2f, pass : %%%-6.2f , proficiency : %%%-6.2f.\n\n",(float)E/n,(float)100*Ej/n,(float)100*Ey/n);
}
void Que_Cla()
{
Sort();
n = C = M = E = Cj = Cy = Mj = My = Ej = Ey = 0;
printf("\n Please enter the class you want to query : ");
scanf("%s",num);
printf("\n");
for(u = head->next; u != NULL;u = u->next)
{
if(strcmp(u->classs,num))
continue;
if(!n)
Print_Head_Cla;
n++;
printf("%-11s%-15s",u->number,u->name);
printf("%-6d%-6d%-6d%-d\n",u->score.chinese,u->score.math,u->score.english,u->score.sum);
Analyze_Sco(u);
}
if(!n)
{
printf(" There is no student information for this class !\n");
return ;
}
printf("\n There are altogether students in this class %d people .\n\n",n);
Print_Sco();
}
void Que_All()
{
Sort();
n = C = M = E = Cj = Cy = Mj = My = Ej = Ey = 0;
printf("\n");
if(head->next == NULL)
{
printf("---> No student information !\n");
return ;
}
Print_Head_All;
for(u = head->next; u != NULL;u = u->next)
{
n++;
printf("%-12s%-12s%-15s",u->classs,u->number,u->name);
printf("%-6d%-6d%-6d%-d\n",u->score.chinese,u->score.math,u->score.english,u->score.sum);
Analyze_Sco(u);
}
printf("\n All students in the school %d people .\n\n",n);
Print_Sco();
}
void Save()
{
char c;
printf("\n Confirm save? (Y/N): ");
scanf("%*c%c",&c);
if(c == 'N')
return ;
FILE *fp;
if((fp=fopen("C:\\data.txt","w"))==NULL)
{
printf("\n---> Unable to open file \n");
return ;
}
fputs(" The class Student id The name Chinese language and literature mathematics English Total grade ",fp);
if(head->next != NULL)
fputs("\n",fp);
for(u = head->next; u != NULL;u = u->next)
{
fprintf(fp,"%-11s%-11s%-15s",u->classs,u->number,u->name);
fprintf(fp,"%-6d%-6d%-6d%-d",u->score.chinese,u->score.math,u->score.english,u->score.sum);
if(u->next != NULL)
fprintf(fp,"\n");
}
fclose(fp);
printf("\n---> Achievements deposited successfully C:\\\\data.txt In the \n");
}
void Open()
{
printf("\n Please put the data in the directory C:\\\\data.txt In the , Press any key to confirm .\n");
getch();
FILE *fp;
if((fp=fopen("C:\\data.txt","r"))==NULL)
{
printf("\n---> No file found !\n");
return ;
}
char tmp[100];
fgets(tmp,66,fp);
while(!feof(fp))
{
u = new_node(u);
fscanf(fp,"%s%s%s",u->classs,u->number,u->name);
fscanf(fp,"%d%d%d%d",&u->score.chinese,&u->score.math,&u->score.english,&u->score.sum);
u->next = head->next;
head->next = u;
}
printf("\n---> Grades read in successfully !\n");
fclose(fp);
}
void Exi()
{
char c;
printf("\n Are you sure to quit? (Y/N): ");
scanf("%*c%c",&c);
if(c == 'N')
return ;
system("cls");
printf("\n\n");
printf("\t\t\t %c %c %c %c %c %c %c %c %c\n",4,4,4,4,4,4,4,4,4);
printf("\t\t\t %c Made by Xiaod %c\n",4,4);
printf("\t\t\t %c %c %c %c %c %c %c %c %c\n",4,4,4,4,4,4,4,4,4);
printf("\t\t\t Thank you!\n\n\n");
exit(0);
}
int main()
{
int orz;
system("color 0B");
head = new_node(head);
while(1)
{
Welcome();
scanf("%d",&orz);
system("cls");
switch(orz)
{
case 1:Open();break;
case 2:Save();break;
case 3:Add();break;
case 4:Mod();break;
case 5:Del();break;
case 6:Que_One();break;
case 7:Que_Cla();break;
case 8:Que_All();break;
case 9:Exi();break;
default :printf("\n---> Invalid instruction !\n");
}
printf("\n");
system("pause");
system("cls");
}
return 0;
}For more information, please refer to the topic “management system development”.