SML.rar_SML_c＋＋sml

#include <iostream> #include <iomanip> #include "SML.h" using namespace std; SML::SML(int *Memory,int acc,int ins,int ope,int opd,int inr ):memory(Memory) { accumulator=acc; instructionCounter=ins; operationCode=ope; operand=opd; instructionRegister=inr; } void SML::load() { int instruction=0; int i = 0; cout<<"*** Welcome to Simpletron ***"<<endl; cout<<"*** Please enter your program one instruction ***"<<endl; cout<<"*** ( or data word ) at a time. I will type the ***"<<endl; cout<<"*** location number and a question mark ( ? ). ***"<<endl; cout<<"*** You then type the word for that location. ***"<<endl; cout<<"*** Type the sentinel -99999 to stop entering ***"<<endl; cout<<"*** your program. ***" <<endl; cout<<"00"<<" "<<"?"<<" "<<":"; cin>>instruction; while ( instruction != END ) { if (!(instruction>=-99999 &&instruction <=99999) ) { cout<< "Number out of range. Please enter again."<<endl; } else { memory[ i++ ] = instruction; } cout<<setw(2)<<setfill('0')<<i<<" "<<"?"<<" :"; cin>>instruction; } } void SML::execute() { int fatal = FALSE; int temp=0; cout<<endl<<"************START************"<<endl<<endl; instructionRegister = memory[ instructionCounter ]; operationCode = instructionRegister / 100; operand = instructionRegister % 100; while ( operationCode != HALT || !fatal ) { switch ( operationCode ) { case READ: cout<<"Enter an integer: "; cin>>temp; while ( !(temp>=-9999 && temp <=9999) ) { cout<< "Number out of range. Please enter again: " ; cin>>temp; } memory[operand] = temp; ++instructionCounter; break; case WRITE: cout<<"Contents of"<<setw(2)<<setfill('0')<<operand<<":"<<memory[operand]; ++instructionCounter; break; case LOAD: accumulator = memory[ operand ]; ++instructionCounter; break; case STORE: memory[operand ] =accumulator; ++instructionCounter; break; case ADD: temp = accumulator + memory[ operand ]; if ( !(temp>=-9999 && temp<=9999) ) { cout<<"*** FATAL ERROR: Accumulator overflow ***"<<endl; cout<<"*** Simpletron execution abnormally terminated ***"<<endl; fatal = TRUE; } else { accumulator = temp; ++instructionCounter; } break; case SUBTRACT: temp = accumulator - memory[ operand ]; if (!(temp>=-9999 && temp<=9999) ) { cout<<"*** FATAL ERROR: Accumulator overflow ***"<<endl; cout<<"*** Simpletron execution abnormally terminated ***"<<endl; fatal = TRUE; } else { accumulator = temp; ++instructionCounter; } break; case DIVIDE: if ( memory[ operand] == 0 ) { cout<<"*** FATAL ERROR: Attempt to divide by zero ***"<<endl; cout<<"*** Simpletron execution abnormally terminated ***"<<endl; fatal = TRUE; } else { accumulator /= memory[operand ]; ++instructionCounter; } break; case MULTIPLY: temp = accumulator * memory[operand ]; if ( !(temp>=-9999 && temp<=9999 )) { cout<< "*** FATAL ERROR: Accumulator overflow ***"<<endl; cout<< "*** Simpletron execution abnormally terminated ***"<<endl; fatal = TRUE; } else { accumulator = temp; ++instructionCounter; } break; case BRANCH: instructionCounter = operand; break; case BRANCHNEG: if ( accumulator < 0 ) { instructionCounter = operand; } else { ++instructionCounter; } break; case BRANCHZERO: if ( accumulator == 0 ) { instructionCounter = operand; } else { ++instructionCounter; } break; default: cout<<"*** FATAL ERROR: Invalid opcode detected ***"<<endl; cout<<"*** Simpletron execution abnormally terminated ***"<<endl; fatal = TRUE; break; } instructionRegister = memory[ instructionCounter ]; operationCode = instructionRegister / 100; operand = instructionRegister % 100; } cout<<"*************END*************"<<endl; } void SML::dump() { int i; cout<<"REGISTERS:"<<endl<< "accumulator（累加器寄存器）："<<accumulator<<endl<<"instructioncounter（正在执行指令内存位子）：" <<instructionCounter<<endl<<"instructionregister（内存转移）： "<< instructionRegister<<endl <<"operationcode（最后执行操作）："<< operationCode<<endl<< "operand（内存位子）： "<< operand<<endl; cout<<endl<<endl<<"MEMORY:"<<endl; for ( i = 0; i <= 9; i++ ) { cout<<" "<<setw(4)<<setfill(' ')<<i; } for ( i = 0; i <SIZE; i++ ) { if ( i % 10 == 0 ) { cout<<endl<<setw(2)<<setfill('0')<<i/10; } cout<<"+"<<setw(4)<<setfill('0')<<memory[i]<<" "; } cout<<endl; }