matrix5.c

linux下的Ｃ语言开发

/*-*/
/********************************************************
 * Name: Init matrix 					*
 *							*
 * An example of how to initialize a matrix.		*
 ********************************************************/
/*+*/
#define X_SIZE 60
#define Y_SIZE 30

int matrix[X_SIZE][Y_SIZE];


/********************************************************
 * init_matrix -- set every element of matrix to -1	*
 ********************************************************/
void init_matrix(void)
{
    register int index;         /* element counter */
    register int *matrix_ptr;

    matrix_ptr = &matrix[0][0];
    for (index = 0; index < X_SIZE * Y_SIZE; ++index) {
        *matrix_ptr = -1;
        ++matrix_ptr;
    }
}