| ! Program to test SIGN intrinsic |
| program intrinsic_sign |
| implicit none |
| integer i, j |
| real r, s |
| |
| i = 2 |
| j = 3 |
| if (sign (i, j) .ne. 2) STOP 1 |
| i = 4 |
| j = -5 |
| if (sign (i, j) .ne. -4) STOP 2 |
| i = -6 |
| j = 7 |
| if (sign (i, j) .ne. 6) STOP 3 |
| i = -8 |
| j = -9 |
| if (sign (i, j) .ne. -8) STOP 4 |
| r = 1 |
| s = 2 |
| if (sign (r, s) .ne. 1) STOP 5 |
| r = 1 |
| s = -2 |
| if (sign (r, s) .ne. -1) STOP 6 |
| s = 0 |
| if (sign (r, s) .ne. 1) STOP 7 |
| ! Will fail on machines which cannot represent negative zero. |
| s = -s ! Negative zero |
| if (sign (r, s) .ne. -1) STOP 8 |
| end program |
| |
