How can I call notepad.exe from program C?

Question

I wrote a time table program in c

#include<stdio.h> 
#include<conio.h> 
void main()
{
  int i=0;
  int selection;
  char day[20];
  char sub1[20];
  char sub2[20];
  char sub3[20];
  FILE *fp;
  fp=fopen("aa.txt","w");
  textcolor(5);
  textbackground(3);
  clrscr();
  while(i<3)
  {
    printf("Enter the day ");
    scanf("%s",day);
    printf("Enter the period 12.30-1:30 ");
    scanf("%s",sub1);
    printf("Enter the period 1.35-2.40 ");
    scanf("%s",sub2);
    printf("Enter the period 2.45-3.50 ");
    scanf("%s",sub3);
    fprintf(fp,"\n %s TIMETABLE IS AS FOLLOWS\n",day);
    fprintf(fp,"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
    fprintf(fp,"|~~~~~~~~~|~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~|~~~~~~~~~~|\n");
    fprintf(fp,"| TIME    | 12.30-1.30    | 1.35-2.40    |2.45-3.50 |\n");
    fprintf(fp,"|~~~~~~~~~|~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~|~~~~~~~~~~|\n");
    fprintf(fp,"| SUBJECT *     %s     * %s  * %s|\n",sub1,sub2,sub3);
    fprintf(fp,"|~~~~~~~~~|~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~|~~~~~~~~~~|\n");
    i++;
  }
  printf(" Time table has been Created in the File aa.txt successfully");
  getch();
}

when i finish the schedule. a time table is created in a .txt file. I want this file to be open and automatically show it in notepad. how to program this in c?

Answer 1

Using

system("notepad.exe aa.txt");

Answer 2

( system), ( , ) , API Windows. API ( → → ), , CreateProcess() . :

CreateProcess("notepad.exe",   // Name of program to execute
    "aa.txt",                  // Command line
    NULL,                      // Process handle not inheritable
    NULL,                      // Thread handle not inheritable
    FALSE,                     // Set handle inheritance to FALSE
    0,                         // No creation flags
    NULL,                      // Use parent environment block
    NULL,                      // Use parent starting directory 
    &si,                       // Pointer to STARTUPINFO structure
    &pi);                      // Pointer to PROCESS_INFORMATION structure

Notepad, .

Answer 3

: ShellExecute , " " :

#include <windows.h>
#include <Shellapi.h>

// ...

if(ShellExecute(
    NULL,     // No parent window for error message boxes/...
    "open",   // Shell action ("verb") to be performed on the file (as opposed to "print", "explore", ...)
    "aa.txt", // File to be opened
    NULL,     // Command-line parameters - not used when opening documents
    NULL,     // Working directory - the current one is used by default
    SW_SHOW   // State of the window of the application being launched - SW_SHOW is the default
    )<=(HINSTANCE)32     // If ShellExecute returns a value <=32 it means that an error has occurred
   )
{
    puts("Cannot open aa.txt with the default editor - ShellExecute failed.");
}

aa.txt txt.

, :

• ( CreateProcess, notepad.exe); PSPad txt , PSPad, .

• ( notepad.exe?)

• , system, command.com/cmd.exe, Windows / ,

• " ", system, Linux-, .