main()
|
main()
|
{
|
{
|
int i; char *s;
|
int i; char *s;
|
|
|
for (s = "bfnrtvx"; *s; s++)
|
for (s = "bfnrtvx"; *s; s++)
|
printf("%c = 0x%x\n", *s, backslash(*s));
|
printf("%c = 0x%x\n", *s, backslash(*s));
|
f();
|
f();
|
g();
|
g();
|
h();
|
h();
|
for (i = 0x1000000; i&0x7000000; i += 0x1000000)
|
for (i = 0x1000000; i&0x7000000; i += 0x1000000)
|
big(i);
|
big(i);
|
limit();
|
limit();
|
return 0;
|
return 0;
|
}
|
}
|
|
|
backslash(c)
|
backslash(c)
|
{
|
{
|
switch (c) {
|
switch (c) {
|
case 'b':
|
case 'b':
|
return '\b';
|
return '\b';
|
case 'f':
|
case 'f':
|
return '\f';
|
return '\f';
|
case 'n':
|
case 'n':
|
return '\n';
|
return '\n';
|
case 'r':
|
case 'r':
|
return '\r';
|
return '\r';
|
case 't':
|
case 't':
|
return '\t';
|
return '\t';
|
case 'v':
|
case 'v':
|
return '\v';
|
return '\v';
|
}
|
}
|
return c;
|
return c;
|
}
|
}
|
|
|
f() {
|
f() {
|
int i, x = 0, y;
|
int i, x = 0, y;
|
|
|
printf("f:\n");
|
printf("f:\n");
|
for (i = 0; i <= 20; i++) {
|
for (i = 0; i <= 20; i++) {
|
y = i;
|
y = i;
|
switch (i) {
|
switch (i) {
|
case 1: x = i; break;
|
case 1: x = i; break;
|
case 2: x = i; break;
|
case 2: x = i; break;
|
case 7: x = i; break;
|
case 7: x = i; break;
|
case 8: x = i; break;
|
case 8: x = i; break;
|
case 9: x = i; break;
|
case 9: x = i; break;
|
case 16: x = i; break;
|
case 16: x = i; break;
|
case 17: x = i; break;
|
case 17: x = i; break;
|
case 18: x = i; break;
|
case 18: x = i; break;
|
case 19: x = i; break;
|
case 19: x = i; break;
|
case 20: x = i; break;
|
case 20: x = i; break;
|
}
|
}
|
printf("x = %d\n", x);
|
printf("x = %d\n", x);
|
}
|
}
|
}
|
}
|
|
|
g() {
|
g() {
|
int i;
|
int i;
|
|
|
printf("g:\n");
|
printf("g:\n");
|
for (i = 1; i <= 10; i++)
|
for (i = 1; i <= 10; i++)
|
switch (i) {
|
switch (i) {
|
case 1: case 2: printf("1 %d\n", i); break;
|
case 1: case 2: printf("1 %d\n", i); break;
|
case 3: case 4: case 5: printf("2 %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);
|
case 6: case 7: case 8: printf("3 %d\n", i);
|
default:
|
default:
|
printf("d %d\n", i); break;
|
printf("d %d\n", i); break;
|
case 1001: case 1002: case 1003: case 1004:
|
case 1001: case 1002: case 1003: case 1004:
|
printf("5 %d\n", i); break;
|
printf("5 %d\n", i); break;
|
case 3001: case 3002: case 3003: case 3004:
|
case 3001: case 3002: case 3003: case 3004:
|
printf("6 %d\n", i); break;
|
printf("6 %d\n", i); break;
|
}
|
}
|
}
|
}
|
|
|
h()
|
h()
|
{
|
{
|
int i, n=0;
|
int i, n=0;
|
|
|
printf("h:\n");
|
printf("h:\n");
|
for (i = 1; i <= 500; i++)
|
for (i = 1; i <= 500; i++)
|
switch (i) {
|
switch (i) {
|
default: n++; continue;
|
default: n++; continue;
|
case 128: printf("i = %d\n", i); break;
|
case 128: printf("i = %d\n", i); break;
|
case 16: printf("i = %d\n", i); break;
|
case 16: printf("i = %d\n", i); break;
|
case 8: printf("i = %d\n", i); break;
|
case 8: printf("i = %d\n", i); break;
|
case 120: printf("i = %d\n", i); break;
|
case 120: printf("i = %d\n", i); break;
|
case 280: printf("i = %d\n", i); break;
|
case 280: printf("i = %d\n", i); break;
|
case 264: printf("i = %d\n", i); break;
|
case 264: printf("i = %d\n", i); break;
|
case 248: printf("i = %d\n", i); break;
|
case 248: printf("i = %d\n", i); break;
|
case 272: printf("i = %d\n", i); break;
|
case 272: printf("i = %d\n", i); break;
|
case 304: printf("i = %d\n", i); break;
|
case 304: printf("i = %d\n", i); break;
|
case 296: printf("i = %d\n", i); break;
|
case 296: printf("i = %d\n", i); break;
|
case 288: printf("i = %d\n", i); break;
|
case 288: printf("i = %d\n", i); break;
|
case 312: printf("i = %d\n", i); break;
|
case 312: printf("i = %d\n", i); break;
|
}
|
}
|
printf("%d defaults\n", n);
|
printf("%d defaults\n", n);
|
}
|
}
|
|
|
big(x) unsigned x; {
|
big(x) unsigned x; {
|
switch(x&0x6000000){
|
switch(x&0x6000000){
|
case -1:
|
case -1:
|
case -2:
|
case -2:
|
case 0x0000000:
|
case 0x0000000:
|
printf("x = 0x%x\n", x); break;
|
printf("x = 0x%x\n", x); break;
|
case 0x2000000:
|
case 0x2000000:
|
printf("x = 0x%x\n", x); break;
|
printf("x = 0x%x\n", x); break;
|
case 0x4000000:
|
case 0x4000000:
|
printf("x = 0x%x\n", x); break;
|
printf("x = 0x%x\n", x); break;
|
default:
|
default:
|
printf("x = 0x%x (default)\n", x); break;
|
printf("x = 0x%x (default)\n", x); break;
|
}
|
}
|
}
|
}
|
|
|
#include <limits.h>
|
#include <limits.h>
|
|
|
limit() {
|
limit() {
|
int i;
|
int i;
|
|
|
for (i = INT_MIN; i <= INT_MIN+5; i++)
|
for (i = INT_MIN; i <= INT_MIN+5; i++)
|
switch (i) {
|
switch (i) {
|
case INT_MIN: printf("0\n"); break;
|
case INT_MIN: printf("0\n"); break;
|
case INT_MIN+1: printf("1\n"); break;
|
case INT_MIN+1: printf("1\n"); break;
|
case INT_MIN+2: printf("2\n"); break;
|
case INT_MIN+2: printf("2\n"); break;
|
case INT_MIN+3: printf("3\n"); break;
|
case INT_MIN+3: printf("3\n"); break;
|
case INT_MIN+4: printf("4\n"); break;
|
case INT_MIN+4: printf("4\n"); break;
|
default: printf("5\n"); break;
|
default: printf("5\n"); break;
|
}
|
}
|
for (i = INT_MAX; i >= INT_MAX-5; i--)
|
for (i = INT_MAX; i >= INT_MAX-5; i--)
|
switch (i) {
|
switch (i) {
|
case INT_MAX: printf("0\n"); break;
|
case INT_MAX: printf("0\n"); break;
|
case INT_MAX-1: printf("1\n"); break;
|
case INT_MAX-1: printf("1\n"); break;
|
case INT_MAX-2: printf("2\n"); break;
|
case INT_MAX-2: printf("2\n"); break;
|
case INT_MAX-3: printf("3\n"); break;
|
case INT_MAX-3: printf("3\n"); break;
|
case INT_MAX-4: printf("4\n"); break;
|
case INT_MAX-4: printf("4\n"); break;
|
default: printf("5\n"); break;
|
default: printf("5\n"); break;
|
}
|
}
|
}
|
}
|
|
|
