輸入輸出C++從txt文件

Question

閱讀我怎麼可以打印此到一個輸出文件，並通過周和總體周4周計算這些人的工資總和與平均值...

例如TXT文件。 。

doe  jane 
williams tom 
lons  adams 

45.7 56.3 345.6 344.7 // week 1 
43.6 89.0 543.6 12.5 // week 1 person 2 
90.5 78.0 345.4 345.6 //week 1 person 3 
67.5 34.5 56.6 34.5 // week2 person 1 
    etc....for 4 weeks.. 

我知道有通過使用循環更簡單的方法，我可以得到一些幫助，謝謝:)

這是我迄今爲止

#include<iostream> 
#include<fstream> 
#include<cstdlib> 
#include<string> 
#include<iomanip> 
using namespace std; 

int main() 
{ 
ifstream infile; 
ofstream outfile; 

double s1, s2, s3 , s4 ,s5; 
double t1, t2,t3,t4,t5; 
double w1, w2,w3,w4,w5; 
string personlast,personfirst,personlast2,personfirst2,personlast3,personfirst3; 
double sum, average; 
int numberpeople, numberofweeks; 

infile.open("data.txt"); 
outfile.open("output.txt"); 

outfile<< fixed<< showpoint; 
outfile<< setprecision(2); 

infile>> numberpeople >> personlast >> personfirst >> personlast2 >> personfirst2>> 
    personlast3 >> personfirst3 >> numberofweeks; 
outfile<< " The number of salespeople are " << numberpeople <<"they are" << 
personlast << personfirst << "and " << 
personlast2 << personfirst2 << 
"and " << personlast3 << personfirst3 <<"Number of weeks = " << numberofweeks; 


infile>> s1 >> s2 >> s3 >> s4 >> s5; 
outfile <<" sales for week 1 "<< " for" << personlast << personfirst << s1 << s2 
<< s3 << s4 << s5 << endl; 
sum= s1+s2+s3+s4+s5; 
outfile <<"Sum of first week is " << sum<<endl; 

infile >> t1 >> t2 >> t3 >> t4 >> t5; 
outfile <<" sales for week 1 "<< " for" << personlast2 << personfirst2 << t1 << t2 
<< t3 << t4 << t5 <<endl; 



infile.close(); 
outfile.close(); 
return 0; 

Answer 1

我不會爲你做你的功課，因爲我不想，但我會給你一些開始。基本概念是遍歷文件，讀取每一行。使用像（僞代碼）這樣​​的控件;

while (string = readline() != EOF) 
{ 
    //split string on delimiters in this case spaces 
    if (string piece is not an int) 
    { 
     // this is a name 
     // set first and last name here 
    } 

    if (string piece is an int) 
    { 
     // set ints, 
    } 
} 

您還需要一些結構（這些應該可能是類，如果您已經瞭解了這些結構）來保存數據。如果您可以使用字符串，則使用它們而不是char*，如果您使用char*，則必須動態聲明字符數組。如果允許的話，或者你可以讓它們成爲char[64] first_name;。

struct person { 
    char *first_name; 
    char *last_name; 
    numbers[4] numbers; 
}; 

struct numbers { 
    float item1; 
    float item2; 
    float item3; 
    float item4; 
}; 

當您讀取數據時，您需要將其讀入人員結構的實例中。