一个较完善的学生成绩管理系统源代码分析!!

1、一个较完善的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 3 float Stu_ScoreN1N2; float S_AveN1; float C_AveN2;int AN2;/*function declaration*/void print_menu();void input_score(); /*input students scores

2、*/void 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

3、 */*main()*/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 */*i

4、nput_score()*/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

5、(ttthe average score 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 menun);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_Ave

6、i/=N1;void print_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 menun);getch();/*find_max_course(

7、)*/void find_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+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|YE