标签:字符串
思路:先转化为二进制再转化为八进制
代码:
#include <stdio.h>
#include <string.h>
#define M 100005
char s[M*4];
char str[M];
int ans[150005];
int main(){
	int n;
	//char temp[6];
	scanf("%d", &n);
	while(n --){
		scanf("%s", str+1);
		memset(s, 0, sizeof(s));
		int i, j, len = strlen(str+1)+1, temp;
	//	printf("%d..\n", len);
		for(i = 1; i < len; ++i){
			if(str[i] >= '0'&&str[i] <= '9'){
				temp = str[i] - '0';
			}
			else temp = 10+str[i]-'A';
			j = i*4;
			while(temp){
				s[j] = temp%2+'0';
				j--;
				temp /= 2;
			}
			while(j > (i-1)*4){
				s[j--] = '0';
			}
		}
	//	printf("%s", &s[1]);
		memset(ans, 0, sizeof(ans));
		int tot = 0;
		for(i = (len-1)*4; i-3 >= 0; i -= 3){
			ans[tot++] = (s[i]-'0')+(s[i-1]-'0')*2+(s[i-2]-'0')*4;
		}
		temp = 1;
		if(s[i] != '\0'){
			++tot;
			while(i > 0&&s[i]!='\0'){
				ans[tot-1] += (s[i]-'0')*temp;
				temp *= 2;
				--i;
			}
		}
		while(tot>0&&ans[tot] == 0) --tot;
		for(i = tot; i >= 0; -- i) printf("%d", ans[i]);
		puts("");
		//
		//for(i = ())
	}
	return 0;
}
 
标签:字符串
原文地址:http://blog.csdn.net/shengweisong/article/details/42616041