1- /* *
1+ /*
22 * Description: BigInt (Big Integer library)
33 * Usage: See constructors, operators like +, -, *, /, >, >=, <, <=, ==, toString
44 * Note: Remove references '&' in overloaded operators for chaining operations.
@@ -49,7 +49,7 @@ class Bigint {
4949
5050 // Put everything back to original state
5151 for (int i = 0 ; i < maxLen; i++) Y[i]=(' 9' ' 0'
52- X[lenX]=' 0円 ' ' 0円 '
52+ X[lenX]=' 0円 ' ' 0円 '
5353
5454 return len;
5555 }
@@ -83,20 +83,20 @@ class Bigint {
8383 }
8484
8585 template <class T >
86- int divideNmodulo (char *X, int lenX, T divisor, char *Z, T &modulo) {
87- int remainder = 0 ;
88- int size = 0 ;
89- for (int i = lenX-1 ; i >= 0 ; i--){
90- remainder *= 10 ;
91- remainder += X[i]- ' 0'
92- Z[size++] = remainder/divisor + ' 0'
93- remainder %= divisor;
94- }
95- Z[size]=' 0円 '
96- reverse (Z, Z+size);
97- modulo = remainder;
98- return size;
99- }
86+ int divideNmodulo (char *X, int lenX, T divisor, char *Z, T &modulo) {
87+ int remainder = 0 ;
88+ int size = 0 ;
89+ for (int i = lenX-1 ; i >= 0 ; i--){
90+ remainder *= 10 ;
91+ remainder += X[i]- ' 0'
92+ Z[size++] = remainder/divisor + ' 0'
93+ remainder %= divisor;
94+ }
95+ Z[size]=' 0円 '
96+ reverse (Z, Z+size);
97+ modulo = remainder;
98+ return size;
99+ }
100100
101101 // Logical Operations
102102 bool equals (char *X, int lenX, char *Y, int lenY) {
@@ -212,7 +212,10 @@ class Bigint {
212212 string toString () {
213213 string s (x, x+length);
214214 reverse (s.begin (), s.end ());
215- return trimZeros (s);
215+ s = trimZeros (s);
216+ if (s.length () == 0 )
217+ return " 0"
218+ return s;
216219 }
217220
218221 friend std::ostream& operator <<(ostream &o, Bigint v) {
@@ -225,10 +228,13 @@ int main() {
225228 Bigint A (" 123456789" // Construct Bigint using string representation
226229 Bigint B (987654321 ); // Construct Bigint using integer representation
227230 Bigint C (" 456789"
228- cout << A * B << endl; // Overridden ostream
229- cout << A * B + C << endl; // Chaining operations
230- cout << (A > B) << endl;
231+ Bigint D (" 0"
232+ cout << " A * B: " // Overridden ostream
233+ cout << " A * B + C: " // Chaining operations
234+ cout << " (A > B): "
235+ cout << " D: "
231236 // logical operations
232237 if (A > B) cout << " A is greater than B"
233- else cout << " B is greater than A"
238+ if (B > A) cout << " B is greater than A"
239+ if (A == B) cout << " A is equal to B"
234240}
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