C语言函数大全(t开头)

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函数名: tell

功能: 取文件指针的当前位置

用法: long tell(int handle);

程序例:

#include

#include

#include

#include

int main(void)

{

int handle;

char msg[] = "Hello world";

if ((handle = open("TEST.$$$", O_CREAT | O_TEXT | O_APPEND)) == -1)

{

perror("Error:");

return 1;

}

write(handle, msg, strlen(msg));

printf("The file pointer is at byte %ld\n", tell(handle));

close(handle);

return 0;

}

函数名: textattr

功能: 设置文本属性

用法: void textattr(int attribute);

程序例:

#include

int main(void)

{

int i;

clrscr();

for (i=0; i<9; i++)

{

textattr(i + ((i+1) << 4));

cprintf("This is a test\r\n");

}

return 0;

}