ifstream « open « C File Q&A

1. cannot open a file with ifstream when MPI is turned on    stackoverflow.com

Greetings! I am learning the ways of MPI programming and I've stumbled upon this problem. As a starting point I have a text file "data.txt" with a single line of "1.0". I ...

2. Why is ifstream not opening my file?    bytes.com

3. a ifstream variable cannot open the same file twice?    bytes.com

Hi~ In the program,I first used the ifstream variable fin open the file and,open it again after called the fin.close().But the fin is fieled to open the file in the second time.The book I'm learning hadn't picked out this.Is it a common problem?Or just occurs in Vc++6.0? #include #include using namespace std; int count(ifstream& fin); void find_median(ifstream& fin,int n); main() { ...

4. ifstream not opening    bytes.com

hi I have a code, the part which is troubling goes like this ************************************************** ************** #include #include #include using std::ifstream; using std::ofstream; .... ifstream ifs(f_name.c_str()); if( ifs.is_open() ) cout << "is open" << endl; else cout << "closed" << endl; .... when run into the debugger "gdb" it shows "closed", however it prints "p f_name" fine and if ...

5. reopening file with ifstream.open()    forums.devshed.com

Hello, I'm trying to develop project dedicated to buffering huge ammount of data. I have created an static ring buffer, but I have to be prepared for amount that I can not predict. So I decided to make use of disc space and here is brief alghoritm of my program when it should throw a buffer to disc: and than read ...

6. Ifstream.open Problem    forums.devshed.com

#include "threen.h" int main() { string strFilename; ifstream ifInstream; cout << "Welcome to the cycle length determiner." << endl << endl; do { cout << "Please enter the name of the file you wish to open: "; cin >> strFilename; ifInstream.open(strFilename.c_str(), ios::in); if(ifInstream.fail()) cout << "Error. That filename does not exist." << endl; }while(ifInstream.fail()); calcLongestCycle(ifInstream); ifInstream.close(); return 0; }