file input in hic

File Input in HiCRun menuSet Input File Load InputInput (Interactive) (Batch)OK

We want to know how to do it ourselves, right?*

Review: Standard Input/Output Stream// Header file#include

int size; float avg;

cin >> size;// cin: Standard input stream // >>: input operator

cout

Header File // Input streamclass istream{private: // Members:

public: bool eof(); void get(char& x); void getline(char s[], int size, char endChar); };

istream cin;// Variable of istream// connecting cin to keyboard*

Header File // Output streamclass ostream{private: // Members

public: bool good(); bool fail(); };

ostream cout;// Variable of ostream// connecting cout to monitor*

Header File for File I/O// File Stream#include

// Input File Streamclass ifstream{ };

// Output File Streamclass ofstream{ };

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Class ifstream// File Stream#include

class ifstream{private: . . .public: void open(const char fileName[]); // HiC cannot use C++ string for fileName bool good(); bool fail(); void close(); bool eof(); void get(char& x); };*

Class ofstream// File Stream#include

class ofstream{private: . . .public: void open(const char fileName[]); // Not C++ string void close(); bool good(); bool fail(); };

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#include // Defines class ifstream and ofstream

int main(){ // use any identifiers you want ifstream MyInput; ofstream yourOutFile; ifstream p7_File, cin_redirect; ofstream P6Out, cout_redirect;

. . .

return 0;}File Input/Output*

#include

int main(){ ifstream MyInput;

// Open file // void open(const char fileName[]); MyInput.open(P6.IN"); // P6.IN is in the same folder as the source file

MyInput.open(J:\\P6.IN"); // P6.IN could be any where // Escape char \

// Do work

MyInput.close(); // void close(); // No parameter!

return 0;}File Input/Output*

#include #include

int main(){ ifstream MyInput;

MyInput.open(P6.IN");

// Check open operation if (!MyInput.good()) cout

#include #include

int main(){ ifstream MyInput;

MyInput.open(P6.IN");

// Check open operation if (MyInput.fail()) { cout

#include #include

int main(){ ifstream MyInput; ofstream yourOutFile;

MyInput.open(P6.IN"); if (MyInput.fail()) { cout

#include #include

int main(){ ifstream MyInput; ofstream yourOutFile;

MyInput.open(P6.IN"); yourOutFile.open(P6.out);

// Check open file

int x; MyInput >> x; // cin >> x; while (!MyInput.eof()) // cin.eof() { // process data x ++; // output to file yourOutFile x; } return 0;}

File Input/Output*

#include #include

int main(){ ifstream MyInput; ofstream yourOutFile; int x;

MyInput.open(P6.IN"); yourOutFile.open(p6.out); if (MyInput.fail() || !yourOutFile.good()) { cout > x; while (!MyInput.eof()) { x ++; yourOutFile > x; }

MyInput.close(); yourOutFile.close();

return 0;}File Input/Output*

// DO_01: Include header file for file I/O

int main(){ // DO_02: declare variables for file I/O

// DO_03: open file

// DO_04: Check open operation

// DO_05: Read value from a file

// DO_06: Fill condition: read until the end of file while ( ) { // DO_07: Output value to a file }

// DO_08: Close files

}File Input/Output*

int main(){ char x;

cin.get(x); while(!cin.eof()) { if (x == ' ') // process a space else if (x == '\n') // process a new line char else // process a regular char

cin.get(x); }

return 0;}// cin >> x will skip all white spaces.// cin.get() will read in white spaces.Function get() *

int main(){ char x; ifstream MyInput(P6.in");

MyInput.get(x); while(!MyInput.eof()) { if (x == ' ') // process a space else if (x == '\n') // process a new line char else // process a regular char

MyInput.get(x); }

return 0;}// MyInput >> x will skip all white spaces.// MyInput.get() will read in white spaces.

Function get() *

#include #include

int main(){ char file_name[21]; // Cannot use data type string for file_name ifstream MyInput; cout > file_name;

MyInput.open(file_name); // MyInput.open(P6.IN"); // MyInput.open(file_name); NO!

// Check open operation if (!MyInput.good()) { cout

int main(){ ifstream MyInput;

if (!OpenFile(MyInput)) return 1;

// Do work

return 0;}

bool OpenFile(ifstream& inFile){ char file_name[21]; cin >> file_name; inFile.open(file_name);

if (!inFile.good()) { cout

ScheduleQuiz939 AM, Monday

Test 3Next Monday

Final Exam7:00-8:52 pm, Thursday, May 19, 2011, Doudna 103

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Test 3Classes data members (fields) constructors methodsSelection SortingFile I/OEnumeration data typeC String (Array of char )*