符號 | 意義 | 範例 | 說明 |
== |
等於 | a==6 |
判斷 a 是否等於 6 |
!= |
不等於 | a!=6 |
判斷 a 是否不等於 6 |
> |
大於 | a>6 |
判斷 a 是否大於 6 |
< |
小於 | a<6 |
判斷 a 是否小於 6 |
>= |
大於等於 | a>=6 |
判斷 a 是否大於等於 6 |
<= |
小於等於 | a<=6 |
判斷 a 是否小於等於 6 |
[dywang@dyw219 zzz]$ vim op-rel1.c [dywang@dyw219 zzz]$ cat op-rel1.c #include <stdio.h> main() { int a, b; printf("Enter TWO integers: "); scanf("%d %d", &a, &b); if ( a == b ) printf("%d == %d\n", a, b ); if ( a != b ) printf("%d != %d\n", a, b ); if ( a > b ) printf("%d > %d\n", a, b ); if ( a < b ) printf("%d < %d\n", a, b ); if ( a >= b ) printf("%d >= %d\n", a, b ); if ( a <= b ) printf("%d <= %d\n", a, b ); }
[dywang@dyw219 zzz]$ gcc -o op-rel1 op-rel1.c
[dywang@dyw219 zzz]$ ./op-rel1 Enter TWO integers: 2 3 2 != 3 2 < 3
[dywang@dyw219 zzz]$ ./op-rel1 Enter TWO integers: 3 3 3 == 3 3 >= 3 3 <= 3
[dywang@dyw219 zzz]$ ./op-rel1 Enter TWO integers: 4 2 4 != 2 4 > 2 4 >= 2