bigfloat 부등호 오류수정, 뺄셈

#include <iostream> #define DELETE_SAFELY(p) if(p){delete []p;p=NULL;} class bigfloat { private: char *arr; char sign; int leninte, lendeci, lenwh; public: //단항연산자 void operator = (char *); void operator = (double); void operator = (bigfloat &); bigfloat(); bigfloat(char *); bigfloat(double); bigfloat(bigfloat &); ~bigfloat(); //부등호 friend int operator == (bigfloat &, bigfloat &); friend int operator != (bigfloat &, bigfloat &); friend int operator > (bigfloat &, bigfloat &); friend int operator >= (bigfloat &, bigfloat &); friend int operator < (bigfloat &, bigfloat &); friend int operator <= (bigfloat &, bigfloat &); //이항연산자 friend bigfloat operator + (bigfloat &, bigfloat &); friend bigfloat operator - (bigfloat &, bigfloat &); void print(); }; bigfloat::bigfloat() { arr=new char[1]; arr[0]=0; sign='+'; lenwh=leninte=1; lendeci=0; } bigfloat::bigfloat(char *str) { *this=str; } bigfloat::bigfloat(double a) { *this=a; } bigfloat::bigfloat(bigfloat &src) { this->sign = src.sign; this->lendeci = src.lendeci; this->leninte = src.leninte; this->lenwh = src.lenwh; this->arr = new char[this->lenwh]; memcpy(this->arr, src.arr, sizeof(char) * this->lenwh); } bigfloat::~bigfloat() { DELETE_SAFELY(arr); } void bigfloat::operator = (char *tmp) { int i, last, flagdeci=0, ind_arr; char *string; last=strlen(tmp); string=new char[last+1]; memcpy(string,tmp,sizeof(char)*last+1); if(string[0] == '+' || string[0] == '-') //부호제거 { sign=string[0]; for(i=0; i<last; i++) string[i]=string[i+1]; last--; } for(i=0; i<last; i++) { if(string[i]=='.') //.있으면 { flagdeci=1; break; } } if(flagdeci) { for(i=last-1; string[i]=='0'; i--) //0제거 { string[i]='\0'; } if(string[i]=='.') string[i]='\0'; } for(i=0; string[i]!='.' && string[i]!='\0'; i++); leninte=i; if(flagdeci) i++; for(; string[i]!='\0'; i++); lendeci = i - (leninte+flagdeci); lenwh = leninte + lendeci; DELETE_SAFELY(arr); arr=new char[lenwh]; ind_arr=i=0; while(string[i]!='\0') { arr[ind_arr++]=string[i++]-'0'; if(string[i]=='.') i++; } } void bigfloat::operator = (double a) { char string[512]; sprintf(string,"%lf",a); *this=string; } void bigfloat::operator = (bigfloat &src) { this->lendeci = src.lendeci; this->leninte = src.leninte; this->lenwh = src.lenwh; //delete_safely(arr); DELETE_SAFELY(arr); this->arr = new char[this->lenwh]; memcpy(this->arr, src.arr, sizeof(char) * this->lenwh); } int operator == (bigfloat &first, bigfloat &second) { int i; if(first.sign != second.sign) return 0; if(first.leninte != second.leninte) return 0; if(first.lendeci != second.lendeci) return 0; for(i=0; i<first.lenwh; i++) { if(first.arr[i] != second.arr[i]) return 0; } return 1; } int operator != (bigfloat &first, bigfloat &second) { return !(first == second); } int operator > (bigfloat &first, bigfloat &second) { int _true=1, _false=0; int i, lmt; if(first == second) return 0; if(first.sign == '-') { if(second.sign == '+') return 0; else { _true=0; _false=1; } } else if(second.sign == '-') //first.sign == '+' && second.sign == '-' return 1; if(first.leninte < second.leninte) return _false; if(first.leninte > second.leninte) return _true; lmt=(first.lenwh < second.lenwh)?first.lenwh:second.lenwh; for(i=0; i<lmt; i++) { if(first.arr[i] < second.arr[i]) return _false; if(first.arr[i] > second.arr[i]) return _true; } if(first.lenwh < second.lenwh) return _false; return _true; } int operator >= (bigfloat &first, bigfloat &second) { if(first == second || first > second) return 1; return 0; } int operator < (bigfloat &first, bigfloat &second) { int _true=1, _false=0; int i, lmt; if(first == second) return 0; if(first.sign == '-') { if(second.sign == '+') return 1; else { _true=0; _false=1; } } else if(second.sign == '-')//first.sign == '+' && second.sign == '-' return 0; if(first.leninte > second.leninte) return _false; if(first.leninte < second.leninte) return _true; lmt=(first.lenwh < second.lenwh)?first.lenwh:second.lenwh; for(i=0; i<lmt; i++) { if(first.arr[i] >second.arr[i]) return _false; if(first.arr[i] < second.arr[i]) return _true; } if(first.lenwh > second.lenwh) return _false; return _true; } int operator <= (bigfloat &first, bigfloat &second) { if(first < second || first == second) return 1; return 0; } bigfloat operator + (bigfloat &first, bigfloat &second) { int lennew, point, ind_result, ind_shorter, i, j, flag; char *result, *string; bigfloat toreturn; bigfloat &longer=(first.leninte > second.leninte)?first:second; bigfloat &shorter=(first.leninte <= second.leninte)?first:second; lennew = point = (first.leninte > second.leninte)?first.leninte:second.leninte; lennew += (first.lendeci > second.lendeci)?first.lendeci:second.lendeci; result = new char[lennew+1]; memset(result, 0, sizeof(char) * (lennew + 1)); memcpy(result+1, longer.arr, sizeof(char) * longer.lenwh); if(shorter.lendeci > longer.lendeci) ind_result=lennew; else ind_result=lennew - (longer.lendeci - shorter.lendeci); ind_shorter=shorter.lenwh-1; while(ind_shorter >= 0) { result[ind_result] += shorter.arr[ind_shorter]; for(i=ind_result; result[i]>=10; i--) { result[i-1] += 1; result[i] -= 10; } ind_result--; ind_shorter--; } flag=0; if(result[0] != 0) flag=1; string = new char[lennew + 1 + flag + 1]; string[point + flag] = '.'; i = 1 - flag; j=0; while(j < lennew + flag +1) { string[j++] = result[i++] + '0'; if(string[j]=='.') j++; } string[j]='\0'; toreturn=string; DELETE_SAFELY(string); DELETE_SAFELY(result); return toreturn; } bigfloat operator - (bigfloat &first, bigfloat &second) { int lennew, point; int ind_result, ind_smaller, i, flag; char *result, *string; bigfloat &bigger = (first >= second)?first:second; bigfloat &smaller = (first < second)?first:second; bigfloat toreturn; lennew = point = bigger.leninte; lennew += (bigger.lendeci > smaller.lendeci)?bigger.lendeci:smaller.lendeci; result = new char[lennew]; memset(result, 0, sizeof(char)*lennew); memcpy(result, bigger.arr, sizeof(char)*bigger.lenwh); ind_smaller = smaller.lenwh - 1; if(bigger.lendeci > smaller.lendeci) ind_result = (lennew -1) - (bigger.lendeci - smaller.lendeci); else ind_result = lennew - 1; while(ind_smaller >= 0) { result[ind_result] -= smaller.arr[ind_smaller]; for(i=ind_result; result[i]<0; i--) { result[i]+=10; result[i-1]-=1; } ind_result--; ind_smaller--; } flag = 1; if(result[0] != 0 || bigger.leninte == smaller.leninte) flag = 0; point-=flag; string = new char[lennew + 1 + 1 -flag]; //'.','\0'포함 string[point] = '.'; for(i=0, ind_result=flag; i<point; i++, ind_result++) string[i] = result[ind_result] + '0'; for(i=point+1; ind_result<lennew; i++, ind_result++) string[i]=result[ind_result] + '0'; string[i]='\0'; toreturn = string; DELETE_SAFELY(result); DELETE_SAFELY(string); return toreturn; } void bigfloat::print() { int i; for(i=0; i<lenwh; i++) { if(i==leninte) printf("."); printf("%d",arr[i]); } } int main() { bigfloat a, b, c; char aa[100], bb[100]; a=1; scanf("%s %s",aa,bb); a=aa; b=bb; a.print(); printf(" + "); b.print(); printf(" = "); (a+b).print(); printf("\n"); a.print(); printf(" - "); b.print(); printf(" = "); (a-b).print(); printf("\n"); if(a > b) { a.print(); printf(" > "); b.print(); printf("\n"); } if(a == b) { a.print(); printf(" == "); b.print(); printf("\n"); } if(a < b) { a.print(); printf(" < "); b.print(); printf("\n"); } main(); return 0; }

나눗셈만 만들면 되는 데 막혀버렸네요.

덧셈,뺄셈으로 나눗셈하는 방법 있던 거 같은데 못찾겠네요.

 

저는 흥덕고 쿨가이가 되겠어요.

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