public class TestString { public static void main(String[] args) { String ts = "200-2d+3d6-d3/2+5+3dd6*3d"; //int intaddtmp = 0; //StringBuffer straddtmp = new StringBuffer(); String[] tadd = ts.split("//+"); for (int i=0;i<tadd.length;i++) { String[] tdec = tadd[i].split("-"); for (int i=0;i<tdec.length;i++) { String[] tmul = tdec[i].split("//*"); for (int i=0;i<tmul.length;i++) { String[] tdiv = tmul[i].split("/"); double[] tdivnum = new double[tdiv.length]; for (int i=0;i<tdiv.length;i++) { String[] tdice = tdiv[i].split("d"); int intdiceaddtmp=0; if (tdice[0].eauals(tdiv[i]) continue; if (tdice.length > 2) return "骰子表达式非法"; if (tdice[0].equals("")) tdice[0]="1"; if (tdice.length = 1 ) { for (int idice=0;idice<Integer.parseInt(tdice[0]);idice++) { int tmp = countDice(20); intdiceaddtmp+=tmp; intaddtmp.append("+").append(tmp); } } else { for (int idice=0;idice<Integer.parseInt(tdice[0]);idice++) { int tmp = countDice(strChangint(tdice[1])); intdiceaddtmp+=tmp; intaddtmp.append("+").append(tmp); } } if (tdiv[idiv].eauals(tmul[imul])) continue; //问题 if (tdiv[idiv].equals("")) retrun "第一位就是算术操作符或者算术操作符重复"; tdivnum[idiv] = Double.parseDouble(tdiv[idiv]); if (tdivnum[idiv]==0) retrun "不支持除法运算中含有0"; } double tdivtmp = tdivnum[0] for (idivnum=1;idivnum<tdivnum.length;idivnum++) { tdivtmp = tdivtmp/tdivnum[idivnum]; } tmul[imul]=tdivtmp.toString(); if (tmul[imul].eauals(tsec[idec])) continue; if (tmul[imul].equals("")) retrun "第一位就是算术操作符或者算术操作符重复"; tmulnum[imul] = Double.parseDouble(tmul[imul]); double tdivtmp = tdivnum[0] for (idivnum=1;idivnum<tdivnum.length;idivnum++) { tdivtmp = tdivtmp/tdivnum[idivnum]; } tmul[imul]=tdivtmp.toString(); } } /* if (tt[i].equals("")) tt[i] = "没有内容的字符串"; System.out.println("tt["+i+"]: "+tt[i]); */ } }}
=========================
今天做了一些改动, 比较好的一个版本
/** * */
/** * @author rei * */public class TestString {
/** * @param args */ public static void main(String[] args) { // TODO 自动生成方法存根 String cm = "3-12+10*6/0+5+"; //String cm = "3*2d10/2"; try { System.out.println(countExp(cm)); } catch(NumberFormatException e) { System.out.println("存在非法字符"); }
} public static String countExp(String countmessage) throws NumberFormatException { String returncm = ""; String[] tadd = countmessage.split("//+"); double[] taddnum = new double[tadd.length]; double naddtmp = 0; for (int iadd=0;iadd<tadd.length;iadd++) { String[] tdec = tadd[iadd].split("-"); double[] tdecnum = new double[tdec.length]; double ndectmp = 0; for (int idec=0;idec<tdec.length;idec++) { String[] tmul = tdec[idec].split("//*"); double[] tmulnum = new double[tmul.length]; double nmultmp = 0; for (int imul=0;imul<tmul.length;imul++) { //System.out.println(tmul[imul]); String[] tdiv = tmul[imul].split("/"); double[] tdivnum = new double[tdiv.length]; double ndivtmp = 0; for (int idiv=0;idiv<tdiv.length;idiv++) { if (Double.parseDouble(tdiv[idiv])==0) return "不支持除法表达式中含有0"; if (tdiv[idiv].equalsIgnoreCase("d")) tdiv[idiv] = "1d20"; String[] tdice = tdiv[idiv].split("d"); int intdiceaddtmp=0; if (tdice[0].equals(tdiv[idiv])) { intdiceaddtmp=Integer.parseInt(tdiv[idiv]); //System.out.println(intdiceaddtmp); } else { if (tdice.length > 2) return "骰子表达式非法"; if (tdice[0].equals("")) tdice[0]="1"; if (tdice.length == 1 ) { for (int idice=0;idice<Integer.parseInt(tdice[0]);idice++) { int tmp = countDice(20); intdiceaddtmp+=tmp; //intaddtmp.append("+").append(tmp); } } else { if (!checkDice(Integer.parseInt(tdice[1]))) { return "这个骰子面数有点奇怪..."; } for (int idice=0;idice<Integer.parseInt(tdice[0]);idice++) { int tmp = countDice(Integer.parseInt(tdice[1])); intdiceaddtmp+=tmp; //intaddtmp.append("+").append(tmp); } } } tdiv[idiv] = Integer.toString(intdiceaddtmp); tdivnum[idiv] = Double.parseDouble(tdiv[idiv]); } if (tdiv[0].equals(tmul[imul])) { tmulnum[imul] = Double.parseDouble(tmul[imul]);//continue } else { ndivtmp = tdivnum[0]; for (int idivnum=1;idivnum<tdivnum.length;idivnum++) { ndivtmp = ndivtmp/tdivnum[idivnum]; }
tmulnum[imul] = ndivtmp; } tmul[imul] = Double.toString(tmulnum[imul]); } if (tmul[0].equals(tdec[idec])) { tdecnum[idec] = Double.parseDouble(tdec[idec]);//continue } else { nmultmp = tmulnum[0]; for (int imulnum=1;imulnum<tmulnum.length;imulnum++) { nmultmp = nmultmp*tmulnum[imulnum]; } tdecnum[idec] = nmultmp; //System.out.println(nmultmp); } tdec[idec] = Double.toString(tdecnum[idec]); //System.out.println(tdec[idec]); } if (tdec[0].equals(tadd[iadd])) { taddnum[iadd] = Double.parseDouble(tadd[iadd]);//continue } else { ndectmp = tdecnum[0]; for (int idecnum=1;idecnum<tdecnum.length;idecnum++) { ndectmp = ndectmp-tdecnum[idecnum]; } taddnum[iadd] = ndectmp;
} tadd[iadd] = Double.toString(taddnum[iadd]); } if (tadd[0].equals(countmessage)) { returncm = countmessage + "=" + countmessage; } else { naddtmp = taddnum[0]; for (int iaddnum=1;iaddnum<taddnum.length;iaddnum++) { //System.out.println(naddtmp+":"+iaddnum+":"+taddnum.length); naddtmp = naddtmp+taddnum[iaddnum]; //System.out.println("+:"+naddtmp+":"+taddnum.length); } returncm = countmessage + "=" + Double.toString(naddtmp); } return returncm; }
private static boolean checkDice(int i) { // TODO 自动生成方法存根 switch(i) { case 2: return true; case 3: return true; case 4: return true; case 6: return true; case 8: return true; case 10: return true; case 12: return true; case 20: return true; case 100: return true; default: return false; } }
private static int countDice(int i) { return (int)(Math.random()*i)+1; } }
