diff options
Diffstat (limited to 'lcc/tst/switch.c')
| -rwxr-xr-x | lcc/tst/switch.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/lcc/tst/switch.c b/lcc/tst/switch.c new file mode 100755 index 0000000..0cd48de --- /dev/null +++ b/lcc/tst/switch.c @@ -0,0 +1,137 @@ +main()
+{
+ int i; char *s;
+
+ for (s = "bfnrtvx"; *s; s++)
+ printf("%c = 0x%x\n", *s, backslash(*s));
+ f();
+ g();
+ h();
+ for (i = 0x1000000; i&0x7000000; i += 0x1000000)
+ big(i);
+ limit();
+ return 0;
+}
+
+backslash(c)
+{
+ switch (c) {
+ case 'b':
+ return '\b';
+ case 'f':
+ return '\f';
+ case 'n':
+ return '\n';
+ case 'r':
+ return '\r';
+ case 't':
+ return '\t';
+ case 'v':
+ return '\v';
+ }
+ return c;
+}
+
+f() {
+ int i, x = 0, y;
+
+ printf("f:\n");
+ for (i = 0; i <= 20; i++) {
+ y = i;
+ switch (i) {
+ case 1: x = i; break;
+ case 2: x = i; break;
+ case 7: x = i; break;
+ case 8: x = i; break;
+ case 9: x = i; break;
+ case 16: x = i; break;
+ case 17: x = i; break;
+ case 18: x = i; break;
+ case 19: x = i; break;
+ case 20: x = i; break;
+ }
+ printf("x = %d\n", x);
+ }
+}
+
+g() {
+ int i;
+
+ printf("g:\n");
+ for (i = 1; i <= 10; i++)
+ switch (i) {
+ case 1: case 2: printf("1 %d\n", i); break;
+ case 3: case 4: case 5: printf("2 %d\n", i); break;
+ case 6: case 7: case 8: printf("3 %d\n", i);
+ default:
+ printf("d %d\n", i); break;
+ case 1001: case 1002: case 1003: case 1004:
+ printf("5 %d\n", i); break;
+ case 3001: case 3002: case 3003: case 3004:
+ printf("6 %d\n", i); break;
+ }
+}
+
+h()
+{
+ int i, n=0;
+
+ printf("h:\n");
+ for (i = 1; i <= 500; i++)
+ switch (i) {
+ default: n++; continue;
+ case 128: printf("i = %d\n", i); break;
+ case 16: printf("i = %d\n", i); break;
+ case 8: printf("i = %d\n", i); break;
+ case 120: printf("i = %d\n", i); break;
+ case 280: printf("i = %d\n", i); break;
+ case 264: printf("i = %d\n", i); break;
+ case 248: printf("i = %d\n", i); break;
+ case 272: printf("i = %d\n", i); break;
+ case 304: printf("i = %d\n", i); break;
+ case 296: printf("i = %d\n", i); break;
+ case 288: printf("i = %d\n", i); break;
+ case 312: printf("i = %d\n", i); break;
+ }
+ printf("%d defaults\n", n);
+}
+
+big(x) unsigned x; {
+ switch(x&0x6000000){
+ case -1:
+ case -2:
+ case 0x0000000:
+ printf("x = 0x%x\n", x); break;
+ case 0x2000000:
+ printf("x = 0x%x\n", x); break;
+ case 0x4000000:
+ printf("x = 0x%x\n", x); break;
+ default:
+ printf("x = 0x%x (default)\n", x); break;
+ }
+}
+
+#include <limits.h>
+
+limit() {
+ int i;
+
+ for (i = INT_MIN; i <= INT_MIN+5; i++)
+ switch (i) {
+ case INT_MIN: printf("0\n"); break;
+ case INT_MIN+1: printf("1\n"); break;
+ case INT_MIN+2: printf("2\n"); break;
+ case INT_MIN+3: printf("3\n"); break;
+ case INT_MIN+4: printf("4\n"); break;
+ default: printf("5\n"); break;
+ }
+ for (i = INT_MAX; i >= INT_MAX-5; i--)
+ switch (i) {
+ case INT_MAX: printf("0\n"); break;
+ case INT_MAX-1: printf("1\n"); break;
+ case INT_MAX-2: printf("2\n"); break;
+ case INT_MAX-3: printf("3\n"); break;
+ case INT_MAX-4: printf("4\n"); break;
+ default: printf("5\n"); break;
+ }
+}
|