Atoi&itoa

Char* ITOA (intNumChar*STR,intRadix) {/*Index Table*/    Charindex[]="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; Unsigned unum;/*Intermediate Variables*/    intI=0, J,k; /*determine the value of the Unum*/    if(radix==Ten&&num<0)/*decimal Negative*/{Unum= (unsigned)-num; Str[i++]='-'; }    Elseunum= (unsigned) num;/*Other conditions*/    /*Conversion*/     Do{str[i++]=index[unum%(unsigned) radix]; Unum/=Radix; } while(Unum); Str[i]=' /'; /*Reverse*/    if(str[0]=='-') K=1;/*decimal Negative*/    Elsek=0; Chartemp;  for(J=k;j<= (i1)/2; j + +) {Temp=Str[j]; STR[J]=str[i-1+k-J]; Str[i-1+k-j]=temp; }    returnstr;}

classSolution { Public:    BOOLIsDigit (Charc) {        if(c >= -&& C <= $)            return true; Else            return false; }    intAtoistringstr) {        Long LongAns =0, res=1; BOOLFlag =false; CharC;  for(intI=0; i < str.size (); i++) {C=Str[i]; if(!flag && (c==' '|| c=='\ t'|| c=='\ r'|| c=='\ n') )Continue; if(!flag && (c=='+'|| c=='-') ){                if(c=='-') Res =-1; Flag=true; Continue; }            if(!flag &&IsDigit (c)) {Flag=true; }            if(!isdigit (c)) Break; Ans= ans *Ten+ (C-'0'); //cout<<ans<< ' <<c<<endl;            if(Ans >Int_max) {                 Break; }} ans*=Res; if(Ans > int_max) ans =Int_max; Else if(Ans < int_min) ans =int_min; return(int) ans; }};

Atoi&itoa