189 8069 5689
#include "stdio.h"#include "conio.h"#include "stdlib.h"#include "string.h"#define MAXSTUDENT (1024)#define CheckData()\{\if(!studentNum)\{\printf("没有学生数据，按任意键返回……\n");\getch();\return;\}\}\int studentNum = 0;typedef struct Student{int id;int cScore;int mathScore;}Student;void ClearStudent(Student* student){memset((void*)student,0,sizeof(*student));}void ShowMainMenu(){system("cls");printf("1.增加记录\n2.计算每个学生的总成绩\n3.计算每门课程的平均成绩\n4.按座号查询学生的成绩\n5.按总分排名\n6.输出前n名的学生的成绩\n7.修改成绩\n0.退出\n");}void ShowCountScore(const Student* student){system("cls");CheckData();for(int i = 0;i studentNum;i++)printf("学生%04d的总成绩：%d\n",(student+i)-id,(student+i)-cScore+(student+i)-mathScore);printf("\n按任意键继续……");getch();}void ShowClassAvg(const Student* student){system("cls");CheckData();double sumc = 0;double summath = 0;for(int i = 0;i studentNum;i++){sumc += (student+i)-cScore;summath += (student+i)-mathScore;}printf("C语言平均成绩为：%lf\n",sumc/studentNum);printf("数学平均成绩为：%lf\n",summath/studentNum);printf("\n按任意键继续……");getch();}void AddStudent(Student* student){system("cls");if(studentNum == MAXSTUDENT){printf("人数已满，按任意键返回……\n");getch();}printf("分别录入座号、C语言成绩、数学成绩：\n");int id = 0;int cScore = 0;int mathScore = 0;scanf("%d%d%d",id,cScore,mathScore);for(int i = 0 ;i studentNum;i++)if((student+i)-id == id){printf("座号重复，按任意键返回……\n");getch();return;}(student+studentNum)-id = id;(student+studentNum)-cScore = cScore;(student+studentNum)-mathScore = mathScore;studentNum++;}void SelectFromID(const Student* student){system("cls");CheckData();printf("输入查询ID:\n");int id = 0;scanf("%d",id);printf("查询结果:\n");for(int i = 0;istudentNum;i++)if(id == (student+i)-id){printf("C语言成绩为：%d\n数学成绩为：%d\n",(student+i)-cScore,(student+i)-mathScore);break;}printf("\n按任意键继续……");getch();}void SortForCount(Student* student){system("cls");CheckData();for(int i = 0;i studentNum;i++){for(int j = studentNum -1;j i;j--)if(((student+j)-cScore+(student+j)-mathScore) ((student+j-1)-cScore+(student+j-1)-mathScore)){Student stu;stu = *(student+j);*(student+j) = *(student+j-1);*(student+j-1) = stu;}}}void SortForN(Student* student,int n){SortForCount(student);if(!studentNum)return;n = nstudentNum?studentNum:n;for(int i = 0;i n;i++)printf("第%d名：\nID：%d\nC语言成绩为：%d\n数学成绩为：%d\n总分为：%d\n\n",i+1,(student+i)-id,(student+i)-cScore,(student+i)-mathScore,(student+i)-cScore+(student+i)-mathScore);printf("\n按任意键继续……");getch();}void UpdateScore(Student* student){system("cls");CheckData();printf("输入修改ID:\n");int id = 0;scanf("%d",id);int i = 0;for(;istudentNum;i++)if(id == (student+i)-id)break;if(i == studentNum)printf("\n查无此人，按任意键继续……");else{printf("输入欲修改的C语言成绩、数学成绩：\n");int cScore = 0;int mathScore = 0;scanf("%d%d",cScore,mathScore);(student+i)-cScore=cScore;(student+i)-mathScore = mathScore;printf("\n按任意键继续……");}getch();}void RunStudent(Student* student){while(1){ShowMainMenu();char chGet = getch();switch(chGet){case '1':AddStudent(student);break;case '2':ShowCountScore(student);break;case '3':ShowClassAvg(student);break;case '4':SelectFromID(student);break;case '5':SortForCount(student);for(int i =0;istudentNum;i++)printf("第%d名：\nID：%d\nC语言成绩为：%d\n数学成绩为：%d\n总分为：%d\n\n",i+1,(student+i)-id,(student+i)-cScore,(student+i)-mathScore,(student+i)-cScore+(student+i)-mathScore);printf("\n按任意键继续……");getch();break;case '6':{int n = 0;printf("输入N：\n");scanf("%d",n);SortForN(student,n);}break;case '7':UpdateScore(student);break;case '0':return;default:break;}}}int main(){Student* allStudent = (Student*)malloc(MAXSTUDENT*sizeof(Student));memset((void*)allStudent,0,MAXSTUDENT*sizeof(Student));RunStudent(allStudent);return 0;}
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第三个函数
#includestdio.h
void
main()
{
int
a,b,back;
int
mulnum(int
a,int
b);
printf("请输入两个整数:");
scanf("%d%d",a,b);
back=mulnum(a,b);
if(back==1)
printf("%d
is
multiple
of
%d\n",a,b);
else
if(back==2)
printf("%d
is
multiple
of
%d\n",b,a);
else
;
}
int
mulnum(int
a,int
b)
{
double
result;
if((result=a%b)==0)
return
1;
else
if((result=b%a)==0)
return
2;
else
return
0;
}
这个函数能技能判断a是否为b的倍数，还能判断b是否为a的倍数。楼主如果不需要第二个功能，把else
if语句
去掉就行了。
#includestdio.h
void delStr(char *s,char p)
{char *p1,*p2;
for(p1=p2=s;*p1;p1++)
if(*p1!=p)*p2++=*p1;
*p2='\0';
}
int main()
{char s[300],ch;
gets(s);
ch=getchar();
delStr(s,ch);
printf("%s\n",s);
return 0;
}