一个较完善的学生成绩管理系统源代码分析

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1、一种较完善旳学生成绩管理系统源代码分析！/* this is a simple management system program */* Author:jiguang_duan */* Date:04-04-06 */ #include #include #define N1 2#define N2 3float Stu_ScoreN1N2;float S_AveN1;float C_AveN2;int AN2;/*-function declaration-*/void print_menu();void input_score(); /*input students scores*/vo

2、id print_s_ave(); /*print students average score */void stu_ave(); /* count students average score */void course_ave(); /* count courses average score */void print_c_ave(); /* print courses average score */void find_max_course(); /* search the max score */void fangcha(); /*count the fangcha */*-main

3、()-*/int main()char ch;for(;)doprint_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);/* end of switch */ /* end of for statement */*-input_score()

4、-*/void input_score(void)int i,j;clrscr();for(i=0;iN1;i+)printf(No.%d,i+1);for(j=0;jN2;j+)scanf(%f,&Stu_Scoreij);/*-stu_ave()-*/void stu_ave(void)int i,j;for (i=0;iN1;i+ )S_Avei=0;for(i=0;iN1;i+)for(j=0;jN2;j+)S_Avei+=Stu_Scoreij;S_Avei/=N2;void print_s_ave(void)int i;clrscr();printf(ttthe average s

5、core table of all studentsn);printf(ttNo.ttave_scoren);for(i=0;iN1;i+)printf(ttNo.%dtt%6.2fn,i,S_Avei);printf(Press any key to return to main menu.n);getch();/*-course_ave()-*/void course_ave(void)int i,j;for (i=0;iN2;i+ )C_Avei=0;for(i=0;iN2;i+)for(j=0;jN1;j+)C_Avei+=Stu_Scoreji;C_Avei/=N1;void pri

6、nt_c_ave(void)int i;char *name=math,chinese,english,physics,chemistry;clrscr();printf(ttthe average score table of all coursesn);printf(ttCourse Namettave_scoren);for(i=0;iN2;i+)printf(tt%stt%6.2fn,namei,C_Avei);printf(Press any key to return the main menu.n);getch();/*-find_max_course()-*/void find

7、_max_course(void)int i,j,t;char *name=math,chinese,english,physics,chemistry;clrscr();for(i=0;iN2;i+)t=0;for(j=1;jN1;j+)if(Stu_ScoretiStu_Scoreji)t=j;printf(%st%dt%6.2fn,namei,t+1,Stu_Scoreti);/*-fangcha()-*/void fangcha(void)float s1=0,s2=0,f;int i;stu_ave();for(i=0;iN1;i+)s1=s1+S_Avei*S_Avei;s2=s2

8、+S_Avei;s2/=N1;f=s1/N1-s2*s2;clrscr();printf(fangcha is %6.2f,f);/*-print_menu()-*/void print_menu()clrscr();textattr(BLUE*16|YELLOW);gotoxy(15,5);cprintf(1.(I)nput Students score);textattr(BLUE*16|YELLOW);gotoxy(15,9);cprintf(2.(S)tudents average score);textattr(BLUE*16|YELLOW);gotoxy(15,13);cprintf(3.(C)ourse average score);textattr(BLUE*16|YELLOW);gotoxy(15,17);cprintf(4.(Q)uit the system);