您好,我在 Windows XP 中使用 Code::Blocks。当我运行这个程序时,我得到一个运行时错误,因为"drawing operation was attempted when there was no current window".
我想知道为什么会这样。
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <windows.h>
#include <conio.h>
void *print_message_function( void *ptr );
main()
{
pthread_t thread1, thread2;
char *message1 = "Thread 1";
char *message2 = "Thread 2";
int iret1, iret2;
iret1 = pthread_create( &thread1, NULL, print_message_function, (void*) message1);
iret2 = pthread_create( &thread2, NULL, print_message_function, (void*) message2);
pthread_join( thread1, NULL);
pthread_join( thread2, NULL);
printf("Thread 1 returns: %d\n",iret1);
printf("Thread 2 returns: %d\n",iret2);
exit(0);
}
void *print_message_function( void *ptr )
{
char *message;
char hello;
for(;;)
{
message = (char *) ptr;
printf("%s \n", message);
Sleep(1000);
// break;
fflush(stdin);
/*drawing operation was attempted when there was no current window*/
//The happens from next line onwords
if(kbhit())
{
hello = getchar();
printf("The interrupt %d", hello);
}
}
}