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  1. #include<iostream>
  2. #include<fstream>
  3. #include<string>
  4. #include<string.h>
  5. #include<sstream>
  6.  
  7. using namespace std;
  8.  
  9. string int2str(int &);
  10.  
  11. int main(void)
  12. {
  13.     char* ptrInName = NULL;
  14.     ptrInName = new char[500];
  15.     char* ptrOutName = NULL;
  16.     ptrOutName = new char[500];
  17.  
  18. 	int x = 0;
  19.  
  20.     cout << "Input:" << endl;
  21.     cin >> ptrInName ;
  22.  
  23.     cout << "\n" << "每幾列取一列:" << endl;
  24. 	cin >> x;
  25.  
  26. 	string y;
  27. 	y = int2str(x);
  28.  
  29.     strcpy(ptrOutName, ptrInName);
  30.  
  31.     char strtoChar[2];
  32.     strcpy(strtoChar, y.c_str());
  33.     strcat(strtoChar, ".xyz");
  34.     char total[] = "-";
  35.     strcat(total, strtoChar); 
  36.  
  37.  
  38.     char *pch = NULL;
  39.     pch = strstr(ptrOutName,".xyz"); 
  40.  
  41.     int num = strlen(total);
  42.  
  43.     strncpy (pch,total,num);
  44.  
  45.     cout << "\n" << "Ouput:" << "\n" << ptrOutName << endl; //
  46.  
  47.     char* file1 = ptrInName;     
  48.     char* file2 = ptrOutName;
  49.     ifstream inFile1( file1 );   
  50.     ofstream outFile( file2 );
  51.  
  52. 	string ptrInNametoString;
  53.     ptrInNametoString.assign(ptrInName); 
  54.  
  55. 	ifstream ipfile;
  56.     char text;    
  57.  
  58.     ipfile.open(ptrInName);
  59.     int aa = 0;
  60.     while (ipfile.get(text))
  61.     {
  62.         if (text=='\n')
  63.         {
  64.         	aa++;
  65.         	if ( (aa%x) == 0)
  66.         	{   
  67.    		    	outFile << "1\n";
  68. 			}
  69. 		}
  70.  
  71.     } 
  72.  
  73.     inFile1.close();
  74.     outFile.close();
  75.  
  76.     system("pause");
  77. 	return 0;
  78. }
  79.  
  80. string int2str(int &i) 
  81. {
  82. 	string s;
  83. 	stringstream ss(s);
  84. 	ss << i;
  85.  
  86. 	return ss.str();
  87. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp: In function 'int main()':
prog.cpp:76:19: error: 'system' was not declared in this scope
     system("pause");
                   ^
stdout 
Standard output is empty
https://ideone.com/VwfpPn
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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