2192.cpp

哈尔滨工业大学ACM 竞赛网上在线试题集锦的源代码

/*  This Code is Submitted by wywcgs for Problem 2192 on 2006-04-03 at 19:43:17 */ 
#include <cstdio>
#include <cctype>
#include <cstring>

const char TYPE[] = "bwdq";
const char TYPE_NAME[][6] = { ".byte", ".word", ".long", ".quad" };
const char HEX[] = "0123456789abcdef";
const int MAX = 128;

char hex(char*&, char*);

int main()
{
	char head[4], num[MAX];
	int i;

	while(scanf("%s", head) != EOF) {
		for(i = 0; TYPE[i] != head[1]; i++);
		printf("\t%s\t", TYPE_NAME[i]);
		while(true) {
			char ch;
			while((ch = getchar()) == ' ' || ch == '\t');
			if(ch == '\n') break;
			else if(ch == ',') { printf(", "); continue; }
			ungetc(ch, stdin);
			scanf("%[0-9a-z]", num);
			int len = strlen(num), k = 0;
			switch(num[len-1]) {
			case 'b': k = 1; break;
			case 'h': k = 2; break;
			case 'o': k = 3; break;
			}
			if(!isdigit(num[len-1])) num[--len] = 0;
			if(k != 1) {
				if(k == 2) printf("0x");
				else if(k == 3) putchar('0');
				printf("%s", num);
			} else {
				printf("0x");
				char* p = num; int r = len & 3;
				if(r != 0) putchar(hex(p, num+r));
				while(p != num+len) putchar(hex(p, p+4));
			}
		}
		putchar('\n');
	}
	
	return 0;
}

char hex(char*& b, char* e)
{
	int v;
	for(v = 0; b != e; b++) v = (v << 1) | (*b - '0');
	return HEX[v];
}