C程序设计作业电子版 成绩管理.doc

C程序设计作业电子版 单科课程成绩管理1 源代码和注释 #include /*引用库函数*/#include#include#include typedef struct /*定义结构体数组*/ char num10; /*学号*/ char name20; /*姓名*/ int score3; /*成绩*/ int add; /*总分*/Student;Student stu80; /*结构体数组变量*/ int menu_select() /*菜单函数*/ char c; do system(cls); /*运行前清屏*/ printf(tt*Students Grade Management System*n); /*菜单选择*/ printf(tt | 1. Input Records |n); printf(tt | 2. Display All Records |n); printf(tt | 3. Sort1 |n); printf(tt | 4. Insert a Record |n); printf(tt | 5. Delete a Record |n); printf(tt | 6. Query |n); printf(tt | 7. Sort2 |n); printf(tt | 8. Statistic |n); printf(tt | 9. Write to a Text file |n); printf(tt | 0. Quit |n); printf(tt*n); printf(tttGive your Choice(0-9):); c=getchar(); /*读入选择*/ while(c9); return(c-0); /*返回选择*/ int Input(Student stud,int n) /*输入若干条记录*/int i=0,j=0; char sign,x10; /*x10为清除多余的数据所用*/ while(sign!=n&sign!=N) /*判断*/ printf(tttstudents num:); /*交互输入*/ scanf(ttt%s,studn+i.num); printf(tttstudents name:); scanf(ttt%s,studn+); printf(tttstudents scores(平时成绩、期中成绩和期末成绩):); scanf(ttt%d,%d,%d,&studn+i.scorej,&studn+i.score+j,&studn+i.score+j); studn+i.add=studn+i.scorej*20/100+studn+i.score+j*20/100+studn+i.score+j*60/100; gets(x); /*清除多余的输入*/ printf(tttany more records?(Y/N); scanf(ttt%c,&sign); /*输入判断*/ i+; return(n+i); void Display(Student stud,int n) /*显示所有记录*/ int i; printf(ttt-n); /*格式头*/ printf(tttnumber name scores addn); printf(ttt-n); for(i=1;i1&i%10=0) /*每十个暂停*/ printf(ttt-n); /*格式*/ printf(ttt); system(pause); printf(ttt-n); printf(ttt); system(pause); void Sort1_by_num(Student stud,int n) /*按学号排序*/ int i,j,*p,*q,s; char t10; for(i=0;in-1;i+) /*冒泡法排序*/ for(j=0;j0) strcpy(t,studj+1.num); strcpy(studj+1.num,studj.num); strcpy(studj.num,t); strcpy(t,studj+1.name); strcpy(studj+1.name,); strcpy(,t); p=studj+1.score; q=studj.score; s=*p; *p=*q; *q=s; s=*(p+1); *(p+1)=*(q+1); *(q+1)=s; s=*(p+2); *(p+2)=*(q+2); *(q+2)=s; p=&studj+1.add; q=&studj.add; s=*p; *p=*q; *q=s; int Insert_a_record(Student stud,int n) /*插入一条记录*/char x10,i=0; /*清除多余输入所用*/ printf(tttstudents num:); /*交互式输入*/ scanf(ttt%s,studn.num); printf(tttstudents name:); scanf(ttt%s,); printf(tttstudents scores:); scanf(ttt%d,%d,%d,&studn.scorei,&studn.score+i,&studn.score+i); stun.add=studn.scorei*20/100+studn.score+i*20/100+studn.score+i*60/100; gets(x); n+; Sort_by_num(stud,n); /*调用排序函数*/ printf(tttInsert Successed!n); /*返回成功信息*/ return(n); int Delete_a_record(Student stud,int n) /*按姓名查找，删除一条记录*/ char s20; int i=0,j; printf(ttttell me his(her) name:); /*交互式问寻*/ scanf(%s,s); while(strcmp(,s)!=0&in) i+; /*查找判断*/ if(i=n) printf(tttnot find!n); /*返回失败信息*/ return(n); for(j=i;jn-1;j+) /*删除操作*/ strcpy(studj.num,studj+1.num); strcpy(,studj+1.name); for(n=0;n3;n+) studj.scoren=studj+1.scoren; stuj.add=stuj+1.add; printf(tttDelete Successed!n); /*返回成功信息*/ return(n-1); void Query_a_record(Student stud,int n) /*查找并显示一个记录*/ char s20,j=0; int i=0; printf(tttinput his(her) name:); /*交互式输入*/ scanf(ttt%s,s); while(strcmp(,s)!=0&in) i+; /*查找判断*/ if(i=n) printf(tttnot find!n); /*输入失败信息*/ return; printf(ttthis(her) number:%sn,studi.num); /*输出该学生信息*/ printf(ttthis(her) scores:%d,%d,%dn,studi.scorej,studi.score+j,studi.score+j); printf(ttthis(her) add:%d,stui.add);void Sort2_by_add(Student stud,int n) /*按总分排序*/ int i,j,*p,*q,s; char t10; for(i=0;in-1;i+) /*冒泡法排序*/ for(j=0;j0) strcpy(t,studj+1.add); strcpy(studj+1.add,studj.add); strcpy(studj.add,t); strcpy(t,studj+1.num); strcpy(studj+1.num,studj.num); strcpy(studj.num,t); strcpy(t,studj+1.name); strcpy(studj+1.name,); strcpy(,t); p=studj+1.score; q=studj.score; s=*p; *p=*q; *q=s; s=*(p+1); *(p+1)=*(q+1); *(q+1)=s; s=*(p+2); *(p+2)=*(q+2); *(q+1）=s; void Statistic(Student stu,int n) /*输出各分数段人数*/ int a=0,b=0,c=0,d=0,e=0; for(i=0;in;i+) if(stui.add=60&stui.add=70&stui.add=80&stui.add=90&stui.add=100) e+; printf(add scores60 %dn60=add scores70 %dn70=add scores80 %dn80=add scores90 %dn90=add scores100 %dn,a,b,c,d,e);void WritetoText(Student stud,int n) /*将所有记录写入文件*/ int i=0; FILE *fp; /*定义文件指针*/ char filename20; /*定义文件名*/ printf(tttWrite Records to a Text Filen); /*输入文件名*/ printf(tttInput the filename:); scanf(ttt%s,filename); if(fp=fopen(filename,w)=NULL) /*打开文件*/ printf(tttcannt open the filen); system(pause); return; fprintf(fp,%dn,n); /*循环写入数据*/ while(in) fprintf(fp,%-16s%-15s%dn,studi.num,,studi.score0,studi.score1,studi.score2,stui.add); i+; fclose(fp); /*关闭文件*/ printf(Successed!n); /*返回成功信息*/ void main() /*主函数*/ int n=0; for(;) switch(menu_select() /*选择判断*/ case 1: printf(tttInput Recordsn); /*输入若干条记录*/ n=Input(stu,n); break; case 2: printf(tttDisplay All Recordsn); /*显示所有记录*/ Display(stu,n); break; case 3: printf(tttSort1n); Sort1_by_num(stu,n); /*按学号排序*/ printf(tttSort1 Suceessed!n); printf(ttt); system(pause); break; case 4: printf(tttInsert a Recordn); n=Insert_a_record(stu,n); /*插入一条记录*/ printf(ttt); system(pause); break; case 5: printf(tttDelete a Recordn); n=Delete_a_record(stu,n); /*按姓名查找，删除一条记录*/ printf(ttt); system(pause); break; case 6: printf(tttQueryn); Query_a_record(stu,n); /*查找并显示一个记录*/ printf(ttt); system(pause); break; case 7: printf(tttSort2n); Sort2_by_add(stu,n); /*按总分排序*/ printf(ttt); system(pause); break; case 8: printf(tttStatisticn); Statistic(stu,n); printf(ttt); system(pause); break; case 9: printf(tttWrite to a Text filen); WritetoText(stu,n); /*循环写入数据*/ printf(ttt); system(pause); break; case 0: printf(tttHave a Good Luck,Bye-bye!n); /*结束程序*/ printf(ttt); system(pause); exit(0); 2. 编译链接生成的目标文件-Configuration: fjhj- Win32 Debug- Compiling. ykyuk.cpp c:program filesmicrosoft visual studiomyprojectsfjhjjhgjhj.cpp(317) : warning C4244: = : conversion from double to float, possible loss of data Linking.3. 可执行文件 -Configuration: fjhj - Win32 Debug-Compiling.jhgjhj.cppc:program filesmicrosoft visual studiomyprojectsfjhjjhgjhj.cpp(317) : warning C4244: = : conversion from double to float, possible loss of dataLinking.fjhj.exe - 0 error(s), 0 warning(s)4. 测试过程中所生成的文本文件 *Students Grade Management System* | 1. Input Records | | 2. Display All Records | | 3. Sort | | 4. Insert a Record | | 5. Delete a Record | | 6. Query | | 7. Statistic | | 8. Add Records from a Text File| | 9. Write to a Text file | | 0. Quit | * Give your Choice(0-9):1 Input Records students num:1234567 students name:asdsaf students score:56 any more records?(Y/N)y students num:23452 students name:das students score:78 any more records?(Y/N)y students n