学到两个：
//ignore
cin.ignore();
//ignore a line
cin.ignore(1024, ' ');
#include<cstdio> #include<iostream> #include<string> #include<algorithm> #include<iterator> #include<cstring> //uva 10033 Problem G: Interpreter #define ONLINE_JUDGE using namespace std; int regs[10]; int ram[1000]; int steps; int pc=0; int oper, arg1, arg2; void load_ram() { steps=0; pc=0; memset(regs, 0 ,sizeof(regs)); memset(ram, 0 ,sizeof(ram)); //string s; char s[5]; int i=0; //for(int i=0;getline(cin, s)&&s.length();i++) for(int i=0;fgets(s, sizeof(s), stdin);i++) { if(s[0]==' ') { // printf("\n "); break; } //ram[i]=atoi(s.c_str()); ram[i]=atoi(s); #ifndef ONLINE_JUDGE cout<<ram[i]<<endl; #endif } } void decode() { oper=ram[pc]/100; arg1=ram[pc]/10%10; arg2=ram[pc]%10; pc++; steps++; #ifndef ONLINE_JUDGE printf("steps %d pc %d: %d %d %d ", steps, pc-1, oper, arg1, arg2); #endif } void run() { while(1) { decode(); switch(oper) { //halt case 1: goto END; break; //2dn means set register d to n (between 0 and 9) case 2: regs[arg1]=arg2; break; //3dn means add n to register d case 3: regs[arg1]+=arg2; regs[arg1]%=1000; break; //4dn means multiply register d by n case 4: regs[arg1]*=arg2; regs[arg1]%=1000; break; //5ds means set register d to the value of register s case 5: regs[arg1]=regs[arg2]; break; //6ds means add the value of register s to register d case 6: regs[arg1]+=regs[arg2]; regs[arg1]%=1000; break; //7ds means multiply register d by the value of register s case 7: regs[arg1]*=regs[arg2]; regs[arg1]%=1000; break; //8da means set register d to the value in RAM whose address is in register a case 8: regs[arg1]=ram[regs[arg2]]; break; //9sa means set the value in RAM whose address is in register a to the value of register s case 9: ram[regs[arg2]]=regs[arg1]; break; //0ds means goto the location in register d unless register s contains 0 case 0: if(regs[arg2]!=0) pc=regs[arg1]; break; default: break; } } END: return; } int main() { int n; bool first=true; char instr[5]={0}; //cin>>n; scanf("%d", &n); //ignore //cin.ignore(); fgets(instr, sizeof(instr), stdin); memset(instr, 0, sizeof(instr)); //ignore a line //cin.ignore(1024, ' '); fgets(instr, sizeof(instr), stdin); while(n-- >0) { load_ram(); run(); if(!first) printf(" "); printf("%d ", steps); first=false; } return 0; }