function sol(a:string,res:string[]):string[]{ let [up, down] = a.split('/').map(it => +it); if(up === 0) return res; if(up === 1) { res.push(a); return res } let i:number; for(i = up; i > 1; i--){ if(down % i === 0){ res.push(`1/${down/i}`); return sol(`${up - i}/${down}`, res) } } if(i === 1){ up *= 10; down *= 10; return sol(`${up}/${down}`, res) } } 根据这个思路写了js版本的