数制互转换v0.21(支持补、原、反)

// filename : number_system.cpp // author : ancktion // Create date : 2008/05/17 // // description : // this code function is make for to change the numbers from one number_system to other number_system. Example: dec number system to hex number system // Log: // // reversion : 0.21 2008/05/20 ancktion // 修正进制转换的显示方式: // 1.正数的转换后，显示前面总会有一个0元素开头,否则就不在前面显示0元素(注意:八进制的数可能也会在前面加个零） // 这样可以明显区后那些是正数，那些是负数 // 2.添加了反码与原码的显示方式(在一些教程书中只介绍了二进制的等码),这里将沿伸到其他的编码 // // reversion : 0.2 2008/05/18 ancktion // extended those function support negative // // reversion : 0.1 2008/05/17 ancktion // added function create #include "stdafx.h" #include "number_system.h" #include <iostream> // include std::out and std::in void chg_DecToBin( IO_IN const long int& nDec, IO_OUT char** chBin/* = NULL*/, IO_IN bool bGetCh/* = false*/, IO_IN eNumView eView/* = eNumView_CPLCode*/, IO_IN eNumView eCurCode/* = eNumView_CPLCode*/) { short int iCharCount = 0; _chg_DecToBin((unsigned long int)_DecCodeChage(nDec,eView,eCurCode), nDec<0 ? 1 : 0, chBin, bGetCh, &iCharCount); } bool chg_DecToBin( IO_IN const char* cDec, IO_OUT char** chBin/* = NULL*/, IO_IN bool bGetCh/* = false*/, IO_IN eNumView eView /*= eNumView_CPLCode*/, IO_IN eNumView eCurCode/* = eNumView_CPLCode*/) { if( !_chek_StrIsNumSys(cDec)) return false; long int nDec = 0; nDec = _strToDec(cDec); chg_DecToBin( nDec,chBin,bGetCh,eView,eCurCode); return true; } //------------------------------------------------------------------------- bool chg_NumSysToDec( IO_IN const char* cNumSys, short int nSys, IO_IN_OUT long int& nDec, IO_OUT char** chDec/* = NULL*/, IO_IN bool bGetCh /*= false*/, IO_IN eNumView eGetCode/* = eNumView_CPLCode*/, IO_IN eNumView eCurCode/* = eNumView_CPLCode*/) { if( !_chek_StrIsNumSys(cNumSys,nSys) ) return 0; nDec = _strToDec(cNumSys,nSys); nDec = _DecCodeChage(nDec,eGetCode,eCurCode); if(bGetCh) _chg_DecToStr(nDec,chDec); return true; } //------------------------------------------------------------------------- bool chg_DecToNumSys( IO_IN const long int& nDec, IO_IN short int nSys, IO_OUT char** chNumSys/* = NULL*/, IO_IN bool bGetCh/* = false*/, IO_IN eNumView eView/* = eNumView_CPLCode*/, IO_IN eNumView eCurCode/* = eNumView_CPLCode*/) { short int iCharCount = 0; _chg_DecToNumSys((unsigned long int)_DecCodeChage(nDec,eView,eCurCode), nSys, nDec < 0 ? 1 : 0, chNumSys, bGetCh, &iCharCount); return true; } bool chg_DecToNumSys( IO_IN const char* cDec, IO_IN short int nSys, IO_OUT char** chNumSys/* = NULL*/, IO_IN bool bGetCh /*= false*/, IO_IN eNumView eView /*= eNumView_CPLCode*/, IO_IN eNumView eCurCode/* = eNumView_CPLCode*/) { if( !_chek_StrIsNumSys(cDec)) return false; long int nDec = 0; nDec = _strToDec(cDec); return chg_DecToNumSys(nDec,nSys,chNumSys,bGetCh,eView,eCurCode); } //************************************************************************************************************************************ void _chg_DecToBin( IO_IN const unsigned long int& nDec, IO_IN bool bNeg/* = 0*/, IO_OUT char** chBin/* = NULL*/, IO_IN bool bGetCh/* = false*/, IO_IN short int* iCharCount/* = NULL*/, IO_IN short int iCallLay/* = 0*/ ) { if( 0 == nDec) { if( 0 == iCallLay) { // for input nDec is Zero *iCharCount = iCallLay + 2; std::cout << "0"; if( bGetCh ) *chBin = new char[ *iCharCount ]; (*chBin)[0] = '0'; (*chBin)[1] = '\0'; } // if( 0 == iCallLay) else { if(bNeg == 1) *iCharCount = iCallLay + 1; else *iCharCount = iCallLay + 2; if( bGetCh ) *chBin = new char[ *iCharCount ]; if (bNeg != 1) { (*chBin)[0] = '0'; std::cout<<'0'; } } return; } // if( 0 == nDec) short int iRe = (short int)(nDec % 2); _chg_DecToBin( nDec / 2,bNeg,chBin,bGetCh,iCharCount,iCallLay + 1); std::cout << (char)('0' + iRe); if(bGetCh) (*chBin)[*iCharCount - iCallLay - 2] = (char)('0' + iRe); if( 0 == iCallLay) if(bGetCh) (*chBin)[*iCharCount - 1] = '\0'; } void _chg_DecToNumSys( IO_IN const unsigned long int& nDec, IO_IN short int nSys, IO_IN bool bNeg/* = 0*/, IO_OUT char** chNumSys/* = NULL*/, IO_IN bool bGetCh/* = false*/, IO_IN short int* iCharCount/* = NULL*/, IO_IN short int iCallLay/* = 0*/) { if( 0 == nDec) { if( 0 == iCallLay) { // for input nDec is Zero *iCharCount = iCallLay + 2; std::cout << "0"; if( bGetCh ) *chNumSys = new char[ *iCharCount ]; (*chNumSys)[0] = '0'; (*chNumSys)[1] = '\0'; } // if( 0 == iCallLay) else { if (bNeg == 1) *iCharCount = iCallLay + 1; else *iCharCount = iCallLay + 2; if( bGetCh ) *chNumSys = new char[ *iCharCount ]; if (bNeg != 1) { (*chNumSys)[0] = '0'; std::cout<<'0'; } } return; } // if( 0 == nDec) short int iRe = (short int)(nDec % nSys); _chg_DecToNumSys( nDec / nSys,nSys,bNeg,chNumSys,bGetCh,iCharCount,iCallLay + 1); char c = ' '; if(iRe < 10) c = (char)('0' + iRe); else { iRe = iRe - 10; c = (char)('A' + iRe); } std::cout << c; (*chNumSys)[*iCharCount - iCallLay - 2] = c; if( 0 == iCallLay) if(bGetCh) (*chNumSys)[*iCharCount - 1] = '\0'; } //把十进制整数转换为字符串，不使用STL void _chg_DecToStr( IO_IN long int nDec,IO_OUT char** chDec/* = NULL*/) { if( 0 == nDec ) { *chDec = new char[2]; (*chDec)[0] = '0'; (*chDec)[1] = '\0'; } long int nReDec = 0; short int iChCount = 1; short int iSigned = nDec > 0 ? 1 : -1; nDec = nDec > 0 ? nDec : -nDec; while(nDec) { nReDec = nReDec * 10 + (nDec % 10); nDec /= 10; iChCount ++; } if(iSigned < 0) iChCount ++; *chDec = new char[iChCount]; iChCount = 0; if(iSigned < 0) { (*chDec)[iChCount] = '-'; iChCount ++; } while(nReDec) { (*chDec)[iChCount] = (char)('0' + (nReDec % 10)); nReDec /= 10; iChCount ++; } (*chDec)[iChCount] = '\0'; } bool _chek_StrIsDec( IO_IN const char* cDec ) { if( NULL == cDec ) return false; short int iCount = 0; while( cDec[iCount] != '\0' ) { if(iCount == 0) if(cDec[iCount] == '-' || cDec[iCount] == '+') { iCount ++; continue; } if( cDec[iCount] > '9' || cDec[iCount] < '0') return false; iCount ++; } return true; } //调用时请确保使用的进制在16进制内 bool _chek_StrIsNumSys( IO_IN const char* cNumSys,IO_IN unsigned short int nSys/* = 10*/) { if( NULL == cNumSys ) return false; short int iCount = 0; while( cNumSys[iCount] != '\0' ) { if(iCount == 0) if(cNumSys[iCount] == '-' || cNumSys[iCount] == '+') { iCount ++; continue; } if(cNumSys[iCount] < '0') goto _error; if( nSys <= 10 ) { if( cNumSys[iCount] > '0' + nSys - 1) goto _error; }//if( nSys <= 10 ) else { if( (cNumSys[iCount] > '9' && cNumSys[iCount] < 'A' ) || (cNumSys[iCount] > 'A' + nSys - 10 - 1 && cNumSys[iCount] < 'a') || (cNumSys[iCount] > 'a' + nSys - 10 - 1) ) goto _error; } iCount ++; } return true; _error: std::cout<<"字符串非法！不是指定进制数字符串！\n"; return false; } //nSys可以是2,8,10,16等数，但希望不能超过16进制,cDec是否合法，请在函数外检查 long int _strToDec( IO_IN const char* cDec,IO_IN unsigned short int nSys/* = 10*/) { long int iDec = 0; short int iCount = 0; short int iSigned = 1; if(cDec[iCount] == '-')