一个较完善的学生成绩管理系统源代码分析

一种较完善旳学生成绩管理系统源代码分析！！

/*thisisasimplemanagementsystemprogram*/

/*Author:jiguang_duan*/

/*Date:04-04-06*/#include<stdio.h>

#include<conio.h>

#defineN12

#defineN23

floatStu_Score[N1][N2];

floatS_Ave[N1];

floatC_Ave[N2];

intA[N2];/*--------------------functiondeclaration-----------------*/

voidprint_menu();

voidinput_score();/*inputstudents'scores*/

voidprint_s_ave();/*printstudents'averagescore*/

voidstu_ave();/*countstudents'averagescore*/

voidcourse_ave();/*countcourses'averagescore*/

voidprint_c_ave();/*printcourses'averagescore*/

voidfind_max_course();/*searchthemaxscore*/

voidfangcha();/*countthefangcha*//*------------------------main()---------------------------*/

intmain()

{

charch;for(;;){

do{

print_menu();

ch=toupper(getch());

}while(ch!='I'&&ch!='S'&&ch!='C'&&ch!='Q');

switch(ch){

case'I':input_score();

break;

case'S':stu_ave();

print_s_ave();

break;

case'C':course_ave();

print_c_ave();

break;

case'Q':clrscr();

exit(0);

}/*endofswitch*/

}/*endofforstatement*/}/*------------------------input_score()---------------------*/

voidinput_score(void)

{

inti,j;

clrscr();for(i=0;i<N1;i++){

printf("No.%d",i+1);

for(j=0;j<N2;j++)

scanf("%f",&Stu_Score[i][j]);}

}/*-------------------------stu_ave()--------------------------*/

voidstu_ave(void)

{inti,j;for(i=0;i<N1;i++)

S_Ave[i]=0;for(i=0;i<N1;i++){

for(j=0;j<N2;j++)

S_Ave[i]+=Stu_Score[i][j];

S_Ave[i]/=N2;

}

}voidprint_s_ave(void)

{

inti;clrscr();printf("\t\ttheaveragescoretableofallstudents\n");

printf("\t\tNo.\t\tave_score\n");

for(i=0;i<N1;i++)

printf("\t\tNo.%d\t\t%6.2f\n",i,S_Ave[i]);

printf("Pressanykeytoreturntomainmenu....\n");

getch();

}/*--------------------------course_ave()-----------------------*/

voidcourse_ave(void)

{

inti,j;for(i=0;i<N2;i++)

C_Ave[i]=0;for(i=0;i<N2;i++){

for(j=0;j<N1;j++)

C_Ave[i]+=Stu_Score[j][i];

C_Ave[i]/=N1;

}}voidprint_c_ave(void)

{

inti;

char*name[]={"math","chinese","english","physics","chemistry"};clrscr();printf("\t\ttheaveragescoretableofallcourses\n");

printf("\t\tCourseName\t\tave_score\n");

for(i=0;i<N2;i++)

printf("\t\t%s\t\t%6.2f\n",name[i],C_Ave[i]);

printf("Pressanykeytoreturnthemainmenu......\n");

getch();

}/*--------------------------find_max_course()-----------------------*/

voidfind_max_course(void)

{

inti,j,t;

char*name[]={"math","chinese","english","physics","chemistry"};clrscr();

for(i=0;i<N2;i++){

t=0;

for(j=1;j<N1;j++)

if(Stu_Score[t][i]<Stu_Score[j][i])

t=j;

printf("%s\t%d\t%6.2f\n",name[i],t+1,Stu_Score[t][i]);

}}/*---------------------------fangcha()---------------------------*/

voidfangcha(void)

{

floats1=0,s2=0,f;

inti;stu_ave();

for(i=0;i<N1;i++){

s1=s1+S_Ave[i]*S_Ave[i];

s2=s2+S_Ave[i];

}s2/=N1;

f=s1/N1-s2*s2;clrscr();

printf("fangchais%6.2f",f);

}/*-------------------print_menu()--------------------*/

voidprint_menu()

{

clrscr();

textattr(BLUE*16|YELLOW);

gotoxy(15,5);

cprintf("1.(I)nputStudents'score");

textattr(BLUE*16|YELLOW);

gotoxy(15,9);

cprintf("2.(S)tudents'average