help me to save a file in desured location

[palani12kumar]

I'm writing a program to copy the contents of one file to another one. it working fine. But the problem is it saving the new file in the same location only. I dont know how to save the file to a differnet location. if i want to save the file to a different location( for example i'm currently working in C:\ and want the new file to be saved in d:\xxx\), what i have to do?
please help me

[horace1]

I'm writing a program to copy the contents of one file to another one. it working fine. But the problem is it saving the new file in the same location only. I dont know how to save the file to a differnet location. if i want to save the file to a different location( for example i'm currently working in C:\ and want the new file to be saved in d:\xxx\), what i have to do?
please help me

when you open the output file you specify the path to the target directory, e.g. to open d:\xxx\myfile.txt

pFile = fopen ("d:\\xxx\\myfile.txt","w");
 

you need the escape character \ before the \ speperator

[palani12kumar]

Thank you for your timely help.
Another thing that i want to know is, can we run an .exe file through a c program?
That is we are running a C program. On the Run time at a particular place i want to make an ".exe" file to run. How Can i do this? Is this Possilbe?

[horace1]

Thank you for your timely help.
Another thing that i want to know is, can we run an .exe file through a c program?
That is we are running a C program. On the Run time at a particular place i want to make an ".exe" file to run. How Can i do this? Is this Possilbe?

The function system (available under UNIX and many other systems) has a single parameter, a command line exactly as typed at the keyboard (without the newline), e.g. to list all .c files:

    system("dir *.c");                                         /* call system */
    printf("parent program resumed");
 

The parent process is suspended and the command line dir *.c is passed to the command interpreter which, assuming all is well, executes the dir command. When the command interpreter terminates, the parent process is resumed with system returning the return code from the command processor.

[palani12kumar]

Thanks For your timely help. But i think im not clear in my question.
now i ask it very clearly. This is my problem: Im running a C program. during the program i want to open a media player's EXE file. After opening the program should go on running and the media player should run on another track. There should not any relation between the program execution and the application that was opened by the program, after opening that. the only work for the program should be that, it should open the desired file and should go on in its way.... Is this possible.?

[horace1]

Thanks For your timely help. But i think im not clear in my question.
now i ask it very clearly. This is my problem: Im running a C program. during the program i want to open a media player's EXE file. After opening the program should go on running and the media player should run on another track. There should not any relation between the program execution and the application that was opened by the program, after opening that. the only work for the program should be that, it should open the desired file and should go on in its way.... Is this possible.?

If you were using the command prompt what would the command be to play a track?

If the command was
player track1

the C function call to run player.exe concurrently with the parent program would be

    int pid=spawnlp(P_NOWAIT,"player","player","track1",NULL);
    if(pid < 0) printf("spawnlp fail %d\n ", pid);
    else        printf("spawnlp pid %d\n ", pid);
 

The parameters are:
1. mode: which indicates the state the parent process should take when the child is invoked, e.g. P_WAIT parent waits for child to terminate, P_NOWAIT parent and child run concurrently
2. filename of the command (i.e. player.exe in the above example)
3. subsequent parameters are the command and command line parameters to be passed to the child process (as in the parameter argv[] passed to main())

spawnlp() returns -1 for error or the process ID of the child process

Note that not all compilers have spawnlp() - the following worked OK with DEV-C++ using the GNU gcc compiler under Windows

//  test spawnlp() function to spawn a process
 
#include <stdio.h>
#include <process.h>
#include <time.h>
 
int main(void)
{
    // spawn process player with parameter track1
    int pid=spawnlp(P_NOWAIT,"player","player","track1",NULL);
    if(pid < 0) printf("spawnlp fail %d\n ", pid);   // error
    else        printf("spawnlp pid %d\n ", pid);    // OK
    while(1)           // loop printing X to display every 5 seconds
      { 
         clock_t start_time, cur_time;
         start_time = clock();
         while((clock() - start_time) < 5 * CLOCKS_PER_SEC) {}
         printf("x");
       }
    getchar();
    return 0;
}
 

[palani12kumar]

Thanks a lot for your timely help.