... /scan/(input, "%lf%lf", &triangle_ptr->x[0], &triangle_ptr->y[0]); fscanf(input, "%lf%lf", &triangle_ptr->x[1], &triangle_ptr->y[1]); 7 7 97 98 C programming tor scientists and engineers fscanf(input, ... operation, especially concerning h o w t h e trigonometric values a r e 86 C programming for scientists and engineers 4 .7 The while loop The while loop has the general form: while (continuation ... comparison is carried out using a standard C function called strncmp, which compares the first three characters stored in reply with the string constant 'end' Note that, to use strncmp and strcpy, below,...