首頁(yè) 猿問(wèn) 求一個(gè)javascript描述的解決方案

求一個(gè)javascript描述的解決方案

JavaScript

陪伴而非守候 2019-05-25 15:52:56

Solveagivenequationandreturnthevalueofxintheformofstring"x=#value".Theequationcontainsonly'+','-'operation,thevariablexanditscoefficient.Ifthereisnosolutionfortheequation,return"Nosolution".Ifthereareinfinitesolutionsfortheequation,return"Infinitesolutions".Ifthereisexactlyonesolutionfortheequation,weensurethatthevalueofxisaninteger.Example1:Input:"x+5-3+x=6+x-2"Output:"x=2"Example2:Input:"x=x"Output:"Infinitesolutions"Example3:Input:"2x=x"Output:"x=0"Example4:Input:"2x+3x-6x=x+2"Output:"x=-1"

查看完整描述

2 回答

慕碼人2483693

TA貢獻(xiàn)1860條經(jīng)驗(yàn) 獲得超9個(gè)贊

functiongetX(str){letleft=str.split('=')[0];letright=str.split('=')[1];letarrLeft=left.match(/(\+|\-)?(\d)*(x)?/g);arrLeft.push(left.split(arrLeft[0])[0]);letarrRight=right.match(/(\+|\-)?(\d)*(x)?/g);arrRight.push(right.split(arrRight[0])[0]);letobj={leftNumber:0,leftX:0,rightNumber:0,rightX:0};functiongetCo(el,index,side){if(el===''){return;}if(el.match('x')){letco=null;co=el.match(/(\+|\-)?\d+/)||1;obj[side+'X']+=parseInt(co,10);}else{obj[side+'Number']+=parseInt(el,10);}}arrLeft.forEach((el,index)=>{getCo(el,index,'left')});arrRight.forEach((el,index)=>{getCo(el,index,'right')});letvalueNumber=obj.leftNumber-obj.rightNumber;letvalueX=-(obj.leftX-obj.rightX);letoutputStr='';if(valueNumber===valueX){outputStr='Infinitesolutions';}elseif(valueNumber!==0&&valueX===0){outputStr='Nosolution';}else{outputStr='x='+valueNumber/valueX;}console.log(outputStr);}