our instructor ask us is to create a turbo c program?

Question

fill the screen with character alt-178 entering clockwise

Answer 1

ur question is a bit confusing and ambiguous. i think u want to fill the screen with one character.

#include"stdio.h"
void main()
{
for( int i=0;i<800;i++)
{
for( int j=0;j< 600;j++)
{
printf( "%c", (char)178);
}
}
}

Answer 2

What?

char c = (char)178;

for(lcv = 0; lcv < 80; lcv++)
{
printf("%c", c);
}
printf("\r\n");

Do that a bunch, and you'll have the entire screen set.

Answer 3

You may need to add some delay after printing one character.