C + + large number calculation template

1. Adding large numbers

stringSumstringS1,stringS2) {      if(S1.length () <s2.length ()) {          stringtemp=S1; S1=S2; S2=temp; }      inti,j;  for(I=s1.length ()-1, J=s2.length ()-1; i>=0; I--, j--) {S1[i]=Char(S1[i]+ (j>=0? s2[j]-'0':0));//attention to detail        if(s1[i]-'0'>=Ten) {S1[i]=Char((s1[i]-'0')%Ten+'0'); if(i) s1[i-1]++; Elses1='1'+S1; }      }      returnS1; }  

2. Multiply the number of integers by number of

stringMultiply (stringSintX//large number multiplied by number of shaping{reverse (S.begin (), S.end ()); intcmp=0;  for(intI=0; I<s.size (); i++) {CMP= (s[i]-'0') *x+CMP; S[i]= (cmp%Ten+'0'); CMP/=Ten; }       while(CMP) {s+ = (cmp%Ten+'0'); CMP/=Ten;      } reverse (S.begin (), S.end ()); returns; }  

stringExcept (stringSintX//large number divided by number of shaping{      intcmp=0, ok=0; stringans="";  for(intI=0; I<s.size (); i++) {CMP= (cmp*Ten+s[i]-'0'); if(cmp>=x) {OK=1; Ans+ = (cmp/x+'0'); CMP%=x; }          Else{              if(ok==1) ans+='0';//watch this. To find out what was wrong        }      }      returnans; }  

C + + large number calculation template