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