标签：return int big len 高精 operator const
Part 1:无除法取模无压位
#include<bits/stdc++.h>
#define F(i,i0,n) for(int (i)=(i0);(i)<=(n);++(i))
#define pii pair<int,int>
#define fr first
#define sc second
using namespace std;
inline int rd() {
int f = 0, x = 0;char ch = getchar();
while(!isdigit(ch)) {if(ch == '-')f = 1;ch = getchar();}
while(isdigit(ch)) {x = (x << 3) + (x << 1) + ch - 48;ch = getchar();}
return f ? -x : x;
}
const int N = 5e4 + 5;
const int P = 10, MAXP = 5005;
struct big {
int len, d[MAXP];
big() {
memset(d, 0, sizeof(d));
len = 1;
}
big(int num) {*this = num;}
big(const char *c) {*this = c;}
big operator =(int num) {
len = 0;
while(num) {
d[len++] = num % 10;
num /= 10;
}
return *this;
}
big operator =(const char *num) {
for(int i = 0; num[i] == '0'; num++);//去前导0
len = strlen(num);
if(!len){
d[0]=0;len=1;
return *this;
}
for(int i = 0; i < len; ++i)
d[i] = num[len - i - 1] - '0';
return *this;
}
big operator +(const big &b)const {
big c;
c.len = 0;
for(int i = 0, g = 0; g || i < max(len, b.len); ++i) {
int x = g;
if(i < len)x += d[i];
if(i < b.len)x += b.d[i];
c.d[c.len++] = x % 10;
g = x / 10;
}
return c;
}
void clean() {
while(len > 1 && !d[len - 1])len--;
}
big operator *(const big &b) const {
big c;
c.len = len + b.len;
for(int i = 0; i < len; ++i)
for(int j = 0; j < b.len; ++j)
c.d[i + j] += d[i] * b.d[j];
for(int i = 0; i < c.len; ++i) {
c.d[i + 1] += c.d[i] / 10;
c.d[i] %= 10;
}
c.clean();
return c;
}
big operator -(const big &b)const {
big c;
c.len = 0;
for(int i = 0, g = 0; i < len; ++i) {
int x = d[i] - g;
if(i < b.len)x -= b.d[i];
if(x >= 0)g = 0;
else {
g = 1;
x += 10;
}
c.d[c.len++] = x;
}
c.clean();
return c;
}
bool operator <(const big &b)const {
if(len != b.len)return len < b.len;
for(int i = len - 1; ~i; --i)
if(d[i] != b.d[i])return d[i] < b.d[i];
return 0;
}
bool operator >(const big &b)const {
if(len != b.len)return len > b.len;
for(int i = len - 1; ~i; --i)
if(d[i] != b.d[i])return d[i] > b.d[i];
return 0;
}
big operator +=(const big &b) {*this = *this + b;return *this;}
big operator *=(const big &b) {*this = *this * b;return *this;}
big operator -=(const big &b) {*this = *this - b;return *this;}
bool operator ==(const big &b) {return !(*this > b) && !(*this < b);}
bool operator !=(const big &b) {return !(*this == b);}
bool operator <=(const big &b) {return *this < b || *this == b;}
bool operator >=(const big &b) {return *this > b || *this == b;}
void out()const {
for(int i = len - 1; i >= 0; --i)cout << d[i];
cout << '\n';
}
void in() {
char t[MAXP];
scanf("%s", t);
*this = t;
}
};
signed main() {
return 0;
}
Part 2:完全体(别问为什么还是没有压位,因为懒)
#include<bits/stdc++.h>
#define F(i,i0,n) for(int (i)=(i0);(i)<=(n);++(i))
#define pii pair<int,int>
#define fr first
#define sc second
using namespace std;
inline int rd() {
int f = 0, x = 0;char ch = getchar();
while(!isdigit(ch)) {if(ch == '-')f = 1;ch = getchar();}
while(isdigit(ch)) {x = (x << 3) + (x << 1) + ch - 48;ch = getchar();}
return f ? -x : x;
}
const int N = 5e4 + 5;
const int P = 10, MAXP = 5005;
struct big {
int len, d[MAXP];
big() {
memset(d, 0, sizeof(d));
len = 1;
}
big(int num) {*this = num;}
big(const char *c) {*this = c;}
big operator =(int num) {
len = 0;
while(num) {
d[len++] = num % 10;
num /= 10;
}
return *this;
}
big operator =(const char *num) {
for(int i = 0; num[i] == '0'; num++);//去前导0
len = strlen(num);
if(!len){
d[0]=0;len=1;
return *this;
}
for(int i = 0; i < len; ++i)
d[i] = num[len - i - 1] - '0';
return *this;
}
big operator +(const big &b)const {
big c;
c.len = 0;
for(int i = 0, g = 0; g || i < max(len, b.len); ++i) {
int x = g;
if(i < len)x += d[i];
if(i < b.len)x += b.d[i];
c.d[c.len++] = x % 10;
g = x / 10;
}
return c;
}
void clean() {
while(len > 1 && !d[len - 1])len--;
}
big operator *(const big &b) const {
big c;
c.len = len + b.len;
for(int i = 0; i < len; ++i)
for(int j = 0; j < b.len; ++j)
c.d[i + j] += d[i] * b.d[j];
for(int i = 0; i < c.len; ++i) {
c.d[i + 1] += c.d[i] / 10;
c.d[i] %= 10;
}
c.clean();
return c;
}
big operator -(const big &b)const {
big c;
c.len = 0;
for(int i = 0, g = 0; i < len; ++i) {
int x = d[i] - g;
if(i < b.len)x -= b.d[i];
if(x >= 0)g = 0;
else {
g = 1;
x += 10;
}
c.d[c.len++] = x;
}
c.clean();
return c;
}
big operator /(const big &b)const {
big c, f = 0;
for(int i = len - 1; i >= 0; --i) {
f = f * 10;
f.d[0] = d[i];
while(f >= b) {
f -= b;
c.d[i]++;
}
}
c.len = len;
c.clean();
return c;
}
big operator%(const big &b) {
big r = *this / b;
r = *this - r * b;
r.clean();
return r;
}
bool operator <(const big &b)const {
if(len != b.len)return len < b.len;
for(int i = len - 1; ~i; --i)
if(d[i] != b.d[i])return d[i] < b.d[i];
return 0;
}
bool operator >(const big &b)const {
if(len != b.len)return len > b.len;
for(int i = len - 1; ~i; --i)
if(d[i] != b.d[i])return d[i] > b.d[i];
return 0;
}
big operator +=(const big &b) {*this = *this + b;return *this;}
big operator *=(const big &b) {*this = *this * b;return *this;}
big operator -=(const big &b) {*this = *this - b;return *this;}
big operator /=(const big &b) {*this = *this / b;return *this;}
big operator %=(const big &b) {*this = *this % b;return *this;}
bool operator ==(const big &b) {return !(*this > b) && !(*this < b);}
bool operator !=(const big &b) {return !(*this == b);}
bool operator <=(const big &b) {return *this < b || *this == b;}
bool operator >=(const big &b) {return *this > b || *this == b;}
void out()const {
for(int i = len - 1; i >= 0; --i)cout << d[i];
cout << '\n';
}
void in() {
char t[MAXP];
scanf("%s", t);
*this = t;
}
};
signed main() {
return 0;
}
标签：return,
int,
big,
len,
高精,
operator,
const
From： https://www.cnblogs.com/ussumer/p/17725583.html