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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;
}
}
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