C/C++语言编程
C \u8bed\u8a00\u7f16\u7a0b \u8c22\u8c22\u54c8\u4f60\u8981\u505a\u7684\u662f\u5728\u8fd9\u4e2a\u5de5\u7a0b\u7684\u76ee\u5f55\u4e0b\u5efa\u7acb\u4e00\u4e2a"DUMMY.FIL"\u6587\u4ef6\uff0c\u91cc\u9762\u968f\u4fbf\u5199\u7b26\u5408\u4f60\u7684\u9898\u76ee\u8981\u6c42\u5373\u53ef\u3002\u6216\u8005\u662f\u5c06\u6ce8\u91ca\u6253\u5f00\u81ea\u5df1\u5199
#include
#include
#define MAX_NUM 2000
int main(void)
{
FILE *stream;
//char string[] = "This is a test";
char msg[MAX_NUM]; /* open a file for update */
int flen;
stream = fopen("DUMMY.FIL", "rt"); /* write a string into the file */
//fwrite(string, strlen(string), 1, stream); /* seek to the start of the file */
fseek(stream, 0, SEEK_END); /* go to the end */
flen=ftell(stream); /* get the lenght */
fread(msg,flen,sizeof(char),stream );
msg[flen] = '\0';
printf("%s", msg);
check(msg);
fclose(stream);
return 0;
}
void check(char *msg)
{
while( (*msg) != '\0' )
{
int XIAOXIE_NUM = 0;
int DAXIE_NUM = 0;
int NUM_NUM = 0;
int KONGGE_NUM = 0;
int OTHER_NUM = 0;
switch(*msg)
{
case 'a':;...case'z'; XIAOXIE_NUM++;
case'A':;..case'Z':;DAXIE_NUM++;
case'1':;...case'9':;NUM_NUM++;
case' ':; KONGGE_NUM++;
default: OTHER_NUM++;
}
msg++;
}
printf("%d",OTHER_NUM);/*\u5176\u4ed6\u7684printf \u81ea\u5df1\u5199\u5427*/
}
\u6ca1\u6709\u7f16\u8bd1\u8fc7 \u6709\u9519\u8bef\u6539\u4e0b
\u6211\u6559\u4f60\u628a \u52a0\u6211\u597d\u4e86
//mark.h#include <fstream>
#include <iostream>
using namespace std;
#define usPst 0.3f
#define mdPst 0.3f
#define fnPst 0.4f
class Mark
{
public:
Mark(void);
~Mark(void);
private:
float usual;
float mid;
float final;
float result;
//保留变量float average;
char judgement;
public:
void In(ifstream &infile);
void Out(ofstream &outfile);
void Print();
void ComputeZP(){result=usual*usPst+mid*mdPst+final*fnPst;}//求总评
float GetZP(){return result;}//读总评
char GetDJ(){return judgement;}//读等级
void ComPuteDJ();
};
//mark.cpp
#include "Mark.h"
Mark::Mark(void){}
Mark::~Mark(void){}
void Mark::In(ifstream &infile)
{
infile>>usual>>mid>>final;
}
void Mark::Out(ofstream &outfile)
{
outfile<<result<<' '<<judgement<<endl;
}
void Mark::Print()
{
cout<<result<<' '<<judgement<<endl;
}
void Mark::ComPuteDJ()
{
if(result<=100&&result>=90) judgement='A';
else if(result<90&&result>=80) judgement='B';
else if(result<80&&result>=70) judgement='C';
else if(result<70&&result>=60) judgement='D';
else judgement='E';
}
//student.h
#include "Mark.h"
//#include <string>
using namespace std;
class Student
{
public:
Student(void);
~Student(void);
private:
long Id;
//保留变量string name;
char department;
Mark mark;
public:
void SetId(){cin>>Id;}
long GetId(){return Id;}
void In(ifstream &);
void Out(ofstream&);
void Print();
void Compute(){mark.ComputeZP();mark.ComPuteDJ();};
};
//student.cpp
#include "Student.h"
Student::Student(void){}
Student::~Student(void){}
void Student::In(ifstream & infile)
{
infile>>department>>Id;
mark.In(infile);
}
void Student::Out(ofstream& outfile)
{
outfile<<department<<Id<<' ';
mark.Out(outfile);
}
void Student::Print()
{
cout<<department<<Id<<' ';
mark.Print();
}
//main.cpp
#include "Student.h"
void Compute(Student*);
void Search(Student*);
ifstream infile;
ofstream outfile;
int n;
int main()
{
//路径根据实际修改
infile.open("D:\\VC++6.0\\MSDev98\\MyProjects\\a\\note.dat",ios::in);
outfile.open("D:\\VC++6.0\\MSDev98\\MyProjects\\a\\out.dat",ios::out);
if (infile==NULL) return 1;
if(outfile==NULL) return 1;
int opr;
infile>>n;
Student *stu=new Student[n];
for (int i=0;i<n;i++)
{
stu[i].In(infile);
}
infile.close();
do
{
cout<<"******************************************\n"
<<"* *\n"
<<"* 1计算 2查询 0退出 *\n"
<<"* *\n"
<<"******************************************\n"
<<"输入操作编号（先执行一次计算，之后查询）:"<<endl;
cin>>opr;
if(opr==1) Compute(stu);
else if(opr==2) Search(stu);
else break;
system("pause");
system("cls");
}while(1);
for (int i=0;i<n;i++)
{
stu[i].Out(outfile);
}
outfile.close();
delete []stu;
return 0;
}
void Search(Student* stu)
{
cout<<"输入学生ID:"<<endl;
long Id;
cin>>Id;
int i;
for (i=0;i<n;i++)
{
if(stu[i].GetId()==Id)
{
stu[i].Print();
break;
}
}
if(i==n) cout<<"未找到"<<endl;
}
void Compute(Student *stu)
{
for (int i=0;i<n;i++)
{
stu[i].Compute();
}
}
//student.h
class student
{
public:
char num[10];
char name[10];
char major[10];
public:
student();
~student();
};
//student.cpp
#include"student.h"
student::student()
{
}
student::~student()
{
}
//score.h
#include"student.h"
class Cscore:public student
{
float score[4];
char type;
public:
Cscore();
~Cscore();
void In( ifstream& );
void Out( ofstream& );
void print( );
void ComputeZP( );
void ComputeDJ( );
float GetZP( );
char GetDJ( );
};
//score.cpp
Cscore::Cscore()
{
}
Cscore::~Cscore()
{
}
void Cscore::In( ifstream& in)
{
in>>num>>score[0]>>score[1]>>score[2];
ComputeDJ( );
ComputeDJ( );
}
void Cscore::Out( ofstream& out)
{
out<<num<<'\t'<<score[3]<<'\t'<<type<<endl;
}
void Cscore::print( )
{
cout<<num<<'\t'<<score[3]<<'\t'<<type<<endl;
}
void Cscore::ComputeZP( )
{
score[3]=score[0]*0.3+score[1]*0.3+score[2]*0.4;
}
void Cscore::ComputeDJ( )
{
switch((int)score[3])
{
case 10:case 9:type='A';break;
case 8:type='B';break;
case 7:type='C';break;
case 6:type='D';break;
default:type='E';
}
}
float Cscore::GetZP( )
{
return score[3];
}
char Cscore::GetDJ( )
{
return type;
}
//main.cpp
#include <iostream>
using namespace std;
#include <fstream>
#include"score.h"
int main()
{
ifstream ifile;
ifile.open("note.txt");
ofstream ofile;
ofile.open("out.txt");
int n,i,op;
char name[10];
ifile>>n;
Cscore *psc=new Cscore[n];
for(i=0;i<n;i++)
psc[i].In(ifile);
while(1)
{
cout<<"Please choose:"<<endl;
cout<<"1 for 计算"<<endl;
cout<<"2 for 查询"<<endl;
cout<<"3 for 退出"<<endl;
cin>>op;
switch(op)
{
case 3:goto END;
case 1:
for(i=0;i<n;i++)
{
psc[i].ComputeDJ();
psc[i].ComputeZP();
}
break;
case 2:
cout<<"请输入要查询学号"<<endl;
cin>>name;
for(i=0;i<n;i++)
if(strcmp(psc[i].name,name))break;
if(i==n)
cout<<"没有此学号"<<endl;
else
psc[i].print();
}
}
END:
delete[]psc;
ifile.close();
ofile.close();
return 0;
}
这个其实很简单的，最好自己做做，可以学到东西的。
上面回答的很好了
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