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