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HDU 5083 Instruction --模拟
题意:给出汇编指令,解释出编码或者给出编码,解释出汇编指令。
解法:简单模拟,按照给出的规则一步一步来就好了,主要是注意“SET”的情况,还有要输出的东西最好放到最后一起输出,中间如果一旦不对就可以及时跳出去。
其他也没什么了,只要细心点,多测几组样例就好了。
代码:
#include <iostream>#include <cstdio>#include <cstring>#include <cstdlib>#include <cmath>#include <algorithm>#include <string>using namespace std;#define N 100007string op[8] = {"ADD","SUB","DIV","MUL","MOVE","SET"};string bop[8] = {"000001","000010","000011","000100","000101","000110"};string bina[36],itostr[35];void init(){ for(int i=1;i<32;i++) { string now = ""; int tmp = i; for(int j=0;j<5;j++) { if(tmp%2) now += "1"; else now += "0"; tmp /= 2; } reverse(now.begin(),now.end()); bina[i] = now; //i的二进制形式 tmp = i; string no = ""; while(tmp) { no += tmp%10+‘0‘; tmp/=10; } reverse(no.begin(),no.end()); itostr[i] = no; //i的十进制形式 }}int main(){ string num,A; char ss[3],R1,R2; int sign,i,j,a,b; init(); while(scanf("%d",&sign)!=EOF) { if(sign == 1) { cin>>A; getchar(); if(A != "SET") scanf("%c%d,%c%d",&R1,&a,&R2,&b); else scanf("%c%d",&R1,&a); for(i=0;i<7;i++) { if(A == op[i]) break; } if(i == 7) { puts("Error!"); continue; } if(A != "SET") { if(R1 != ‘R‘ || R2 != ‘R‘ || a <= 0 || a >= 32 || b <= 0 || b >=32) { puts("Error!"); continue; } cout<<bop[i]<<bina[a]<<bina[b]<<endl; } else { if(R1 != ‘R‘|| a <= 0 || a >= 32) { puts("Error!"); continue; } cout<<bop[i]<<bina[a]<<"00000"<<endl; } } else { cin>>num; string A,B,C; string oA,oB,oC; A = num.substr(0,6); B = num.substr(6,5); C = num.substr(11,5); for(i=0;i<7;i++) { if(A == bop[i]) break; } if(i == 7) { puts("Error!"); continue; } oA = op[i]; if(op[i] != "SET") { for(i=0;i<32;i++) { if(B == bina[i]) break; } if(i == 32) { puts("Error!"); continue; } oB = "R"+itostr[i]; for(i=0;i<32;i++) { if(C == bina[i]) break; } if(i == 32) { puts("Error!"); continue; } oC = "R"+itostr[i]; cout<<oA<<" "<<oB<<","<<oC<<endl; } else { if(C != "00000") { puts("Error!"); continue;} for(i=0;i<32;i++) { if(B == bina[i]) break; } if(i == 32) { puts("Error!"); continue; } oB = "R"+itostr[i]; cout<<oA<<" "<<oB<<endl; } } } return 0;}
HDU 5083 Instruction --模拟
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