我正在阅读文件中的输入，确定成绩，打印成绩，ID和4名学生的正确答案。我遇到的问题是答案结尾处第四行有空格，这意味着学生没有回答这些问题。当我在inFile中加载并加载到20的数组中时，它将从下一行开始接下来的2个字符，这是学生ID的第一个数字，我不希望这种情况发生。我想知道如何在输入文件的每一行停止输入。第一行是正确的答案。
TTFTFTTTFTFTFFTTFTTF
54102 T FTFTFTTTFTTFTTF TF
56278 TTFTFTTTFTFTFFTTFTTF
42366 TTFTFTTTFTFTFFTTF/
42586 TTTTFTTT TFTFFFTF
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include<cmath>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char** argv) {
char answers[20];
double points = 0;
struct student1{
char student[20];
int id;
char grade;
char correct[20];
};
struct student2{
char student[20];
int id;
char grade;
char correct[20];
};
struct student3{
char student[20];
int id;
char grade;
char correct[20];
};
struct student4{
char student[20];
int id;
char grade;
char correct[20];
};
student1 s1;
student2 s2;
student3 s3;
student4 s4;
ifstream inFile;
inFile.open("Project9_Input.txt");
if(!inFile)
{
cout << "unable to open input file. "<< endl;
return 1;
}
for(int i=0;i<20;i++)
{
inFile>>answers[i];
}
inFile>>s1.id;
char u;
inFile>>noskipws>>u;
for(int i=0;i<20;i++)
{
inFile>>noskipws>>s1.student[i];
if(cin.peek()== '\n')
{
break;
}
}
inFile>>noskipws>>u;
inFile>>s2.id;
inFile>>noskipws>>u;
for(int i=0;i<20;i++)
{
inFile>>noskipws>>s2.student[i];
}
inFile>>noskipws>>u;
inFile>>s3.id;
inFile>>noskipws>>u;
for(int i=0;i<20;i++)
{
inFile>>noskipws>>s3.student[i];
}
inFile>>noskipws>>u;
inFile>>s4.id;
inFile>>noskipws>>u;
cout<<s4.id<<endl;
for(int i=0;i<20;i++)
{
inFile>>noskipws>>s4.student[i];
}
for(int i=0;i<20;i++)
{
if(answers[i]==s1.student[i])
{
points=points+2;
s1.correct[i] = answers[i];
}
else
if(s1.student[i]=' ')
{
points=points+1; //undo previous if condition to negate the -1.
}
else
if(answers[i]!=s1.student[i])
{
points=points-1;
}
}
double percent = 0;
percent = points/40;
if(percent>=0.9 && percent<=1.0)
{
s1.grade = 'A';
}
if(percent>=0.8 && percent<0.9)
{
s1.grade = 'B';
}
if(percent>=0.7 && percent<0.8)
{
s1.grade = 'C';
}
if(percent>=0.6 && percent<0.7)
{
s1.grade = 'D';
}
if(percent<0.6)
{
s1.grade = 'F';
}
for(int i=0;i<20;i++)
{
if((s1.correct[i]!= 'T') && (s1.correct[i]!= 'F') )
{
s1.correct[i] = ' ';
}
}
cout<<s1.id<<endl;
for(int i=0;i<20;i++)
{
cout<<s1.correct[i];
}
cout<<endl;
cout<<s1.grade<<endl;
cout<<endl;
points = 0;
for(int i=0;i<20;i++)
{
if(answers[i]==s2.student[i])
{
points=points+2;
s2.correct[i] = answers[i];
}
else
if(s2.student[i]=' ')
{
points=points+1; //undo previous if condition to negate the -1.
}
else
if(answers[i]!=s2.student[i])
{
points=points-1;
}
}
percent = points/40;
if(percent>=0.9 && percent<=1.0)
{
s2.grade = 'A';
}
if(percent>=0.8 && percent<0.9)
{
s2.grade = 'B';
}
if(percent>=0.7 && percent<0.8)
{
s2.grade = 'C';
}
if(percent>=0.6 && percent<0.7)
{
s2.grade = 'D';
}
if(percent<0.6)
{
s2.grade = 'F';
}
for(int i=0;i<20;i++)
{
if((s2.correct[i]!= 'T') && (s2.correct[i]!= 'F') )
{
s2.correct[i] = ' ';
}
}
cout<<s2.id<<endl;
for(int i=0;i<20;i++)
{
cout<<s2.correct[i];
}
cout<<endl;
cout<<s2.grade<<endl;
cout<<endl;
points = 0;
for(int i=0;i<20;i++)
{
if(answers[i]==s3.student[i])
{
points=points+2;
s3.correct[i] = answers[i];
}
else
if(s3.student[i]=' ')
{
points=points+1; //undo previous if condition to negate the -1.
}
else
if(answers[i]!=s3.student[i])
{
points=points-1;
}
}
percent = points/40;
if(percent>=0.9 && percent<=1.0)
{
s3.grade = 'A';
}
if(percent>=0.8 && percent<0.9)
{
s3.grade = 'B';
}
if(percent>=0.7 && percent<0.8)
{
s3.grade = 'C';
}
if(percent>=0.6 && percent<0.7)
{
s3.grade = 'D';
}
if(percent<0.6)
{
s3.grade = 'F';
}
for(int i=0;i<20;i++)
{
if((s3.correct[i]!= 'T') && (s3.correct[i]!= 'F') )
{
s3.correct[i] = ' ';
}
}
cout<<s3.id<<endl;
for(int i=0;i<20;i++)
{
cout<<s3.correct[i];
}
cout<<endl;
cout<<s3.grade<<endl;
cout<<endl;
points = 0;
for(int i=0;i<20;i++)
{
if(answers[i]==s4.student[i])
{
points=points+2;
s4.correct[i] = answers[i];
}
else
if(s4.student[i]=' ')
{
points=points+1; //undo previous if condition to negate the -1.
}
else
if(answers[i]!=s4.student[i])
{
points=points-1;
}
}
percent = points/40;
if(percent>=0.9 && percent<=1.0)
{
s4.grade = 'A';
}
if(percent>=0.8 && percent<0.9)
{
s4.grade = 'B';
}
if(percent>=0.7 && percent<0.8)
{
s4.grade = 'C';
}
if(percent>=0.6 && percent<0.7)
{
s4.grade = 'D';
}
if(percent<0.6)
{
s4.grade = 'F';
}
for(int i=0;i<20;i++)
{
if((s4.correct[i]!= 'T') && (s4.correct[i]!= 'F') )
{
s4.correct[i] = ' ';
}
}
cout<<s4.id<<endl;
for(int i=0;i<20;i++)
{
cout<<s4.correct[i];
}
cout<<endl;
cout<<s4.grade;
return 0;
}