主页:(*´∇`*) 咦,又好了~ xiaocr_blog
(1)数据的接收方法和存储方法:
当输入的数据很长的时候,可采取字符串方式输入,这样可以输入位数很长的数,利用字符串函数和操作运算,将每一位数取出,存入数组中。
(2)高精度数位数确定:
位数确定:接收时往往是用字符串的,所以它的位数就等于字符串长度。
(3)高精度除法分为竖式除法还有模拟减法两种
//加法进位 c[i] = a[i] + b[i]
if(c[i]>=10){c[i] %= 10;++c[i+1];}
//减法借位
if(a[i]<b[i]){--a[i+1];a[i]+=10;
c[i] = a[i] - b[i] }
//高除低除法储存无需倒置,竖式除法
//高除高为减法模拟除法
#include<bits/stdc++.h>
using namespace std;
int main() {
char a1[100], b1[100];
int a[100], b[100], c[100];
memset(a, 0, sizeof(a));
memset(b, 0, sizeof(b));
memset(c, 0, sizeof(c));
gets_s(a1);
gets_s(b1);
int lena = strlen(a1);
int lenb = strlen(b1);
for (int i = 0; i <= lena - 1; i++) {
a[lena - i] = a1[i] - '0';
}
for (int i = 0; i <= lenb - 1; i++) {
b[lenb - i] = b1[i] - '0';
}
int lenc = 1;
int x = 0;
while (lenc <= lena || lenc <= lenb) {
c[lenc] = a[lenc] + b[lenc]+x;
x = c[lenc] / 10;
c[lenc] %= 10;
lenc++;
}
c[lenc] = x;
if (c[lenc] == 0) {//处理最高位
lenc--;
}
for (int i = lenc; i >= 1; i--) {
cout << c[i];
}
return 0;
}
#include<bits\stdc++.h>
using namespace std;
int main() {
char a1[100], b1[100],q[100];
int a[100], b[100], c[100];
memset(a, 0, sizeof(a));
memset(b, 0, sizeof(b));
memset(c, 0, sizeof(c));
gets(a1);gets(b1);
if (strlen(a1) < strlen(b1) || (strlen(a1) == strlen(b1)&&strcmp(a1, b1) < 0)) {
strcpy(q, a1);
strcpy(a1, b1);
strcpy(b1, q);
cout << "-";
}
int lena = strlen(a1);
int lenb = strlen(b1);
for (int i = 0; i <= lena - 1; i++) {
a[lena - i] = a1[i] - '0';
}
for (int i = 0; i <= lenb - 1; i++) {
b[lenb - i] = b1[i] - '0';
}
int lenc = 1;
while (lenc <= lena || lenc <= lenb) {
if (a[lenc] < b[lenc]) {
a[lenc] += 10;
a[lenc + 1]--;
}
c[lenc] = a[lenc] - b[lenc];
lenc++;
}
lenc--;
while ((c[lenc] == 0) && (lenc > 1)) {
lenc--;
}
for (int i = lenc; i >= 1; i--) {
cout << c[i];
}
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int main(){
char a1[101],b1[101];
int a[101],b[101],c[101];
int lena,lenb,lenc;
memset(a,0,sizeof(a));
memset(b,0,sizeof(b));
memset(c,0,sizeof(c));
gets(a1),gets(b1);
lena = strlen(a1);lenb = strlen(b1);
for(int i =0;i<=lena-1;i++){
a[lena-i] = a1[i] - '0';
}
for(int i =0;i<=lenb-1;i++){
b[lenb-i] = b1[i] - '0';
}
for(int i =1;i<=lena;i++){
for(int j =1;j<=lenb;j++){
c[i+j-1] += a[i]*b[j];
c[i+j] += c[i+j-1]/10;
c[i+j-1]%=10;
}
}
lenc = lena + lenb;
if(c[lenc]==0&&lenc>=1){
lenc--;
}
for(int i =lenc;i>=1;i--){
cout<<c[i];
}
return 0;
}
#include<bits/stdc++.h>
using namespace std;
char a1[101];
int a[101],c[101],x;
long long b;
int main(){
cin>>a1>>b;
int lena = strlen(a1);
for(int i =1;i<=lena;i++)
{
a[i] = a1[i-1] - '0';
}
for(int i=1;i<=lena;i++){
c[i] = (10*x+a[i])/b;
x = (10*x+a[i])%b;
}
int lenc =1;
while(c[lenc]==0&&lenc<lena){
lenc++;
}
for(int i = lenc;i<=lena;i++){
cout<<c[i];
}
return 0;
}
#include<bits/stdc++.h>
using namespace std;
int a[101], b[101], c[101];
void init(int a[]) {
char st[101];
cin >> st;
a[0] = strlen(st);
for (int i = 1; i <= a[0]; i++) {
a[i] = st[a[0]-i] - '0';
}
}
void output(int a[]) {
if (a[0] == 0) {
cout << 0;
return;
}
for (int i = a[0]; i >= 1; i--) {
cout << a[i];
}
}
int compare(int a[], int b[]) {
if (a[0] > b[0]) return 1;
if (a[0] < b[0]) return -1;
for (int i = a[0]; i >= 1; i--) {
if (a[i] > b[i]) return 1;
if (a[i] < b[i]) return -1;
}
return 0;
}
void minus_(int a[], int b[]) {
int flag;
flag = compare(a, b);
if (flag == 0) {
a[0] = 0;
return;
}
if (flag == 1) {
for (int i = 1; i <= a[0]; i++) {
if (a[i] < b[i]) {
a[i + 1]--; a[i] += 10;
}
a[i] -= b[i];
}
while (a[a[0]] == 0 && a[0] > 0) {
a[0]--;
}
return;
}
}
void numcpy(int p[], int q[], int det) {
for (int i = 1; i <= p[0]; i++) {
q[i + det - 1] = p[i];
q[0] = p[0] + det - 1;
}
}
void chuGao(int a[], int b[], int c[]) {
int tem[101];
c[0] = a[0] - b[0] + 1;
for (int i = c[0]; i >= 1; i--) {
memset(tem, 0, sizeof(tem));
numcpy(b, tem, i);
while (compare(a, tem) > 0) {
c[i]++;
minus_(a, tem);
}
}
while (c[0] > 0 && c[c[0]] == 0) {
c[0]--;
}
return;
}
int main() {
memset(a,0,sizeof(a));
memset(b,0,sizeof(b));
memset(c,0,sizeof(c));
init(a), init(b);
chuGao(a, b, c);
output(c);
return 0;
}
1.大整数的加法
#include<bits/stdc++.h>
using namespace std;
char a1[101], b1[101];
int a[101], b[101], c[101];
int lena, lenb, lenc;
int main() {
cin >> a1 >> b1;
lena = strlen(a1); lenb = strlen(b1);
for (int i = 0; i <= lena - 1; i++) {
a[lena - i] = a1[i] - '0';
}
for (int i = 0; i <= lenb - 1; i++) {
b[lenb - i] = b1[i] - '0';
}
lenc = 1;
while (lenc <= lena || lenc <= lena) {
lenc++;
}
int x = 0;
for (int i = 1; i <= lenc; i++) {
c[i] = a[i] + b[i] + x;
x = c[i] / 10;
c[i] %= 10;
}
while (c[lenc] == 0 && lenc > 0) {
lenc--;
}
for (int i = lenc; i >=1; i--) {
cout << c[i];
}
return 0;
}
2.给定一个整数,计算2的N次方
#include<bits/stdc++.h>
using namespace std;
int a[1001];
int N;
int main() {
a[1] = 1;
cin >> N;
int k = 1,x=0;
for (int j = 1; j <= N; j++) {
x = 0;
for (int i = 1; i <= k; i++) {
a[i] = a[i] * 2 + x;
x = a[i] / 10;
a[i] %= 10;
if (x != 0 && i == k) {
k++;
//伸缩
}
}
}
for (int i = k; i >= 1; i--) {
cout << a[i];
}
return 0;
}
3.大整数的因子
#include<bits/stdc++.h>
using namespace std;
char a1[101];
int a[101], c[101], lena,b, x;
int main() {
cin >> a1;
lena = strlen(a1);
for (int i = 1; i <= lena; i++) {
a[i] = a1[i - 1] - '0';
}
for (int i = 2; i <= 9; i++) {
x = 0;
for (int j = 1; j <= lena; j++) {
c[j] = (a[j] + x * 10) / i;
x = (10 * x + a[j]) % i;
}
if (x % i == 0) {
cout << i << " ";
}
}
return 0;
}
4.*10000以内n的阶乘
#include<bits/stdc++.h>
using namespace std;
int a[10001],b[10001];
int main(){
int n,fac,k=1;
cin>>n;
a[1] = 1;
for(int i =1;i<=n;i++){
for(int j =1;j<=k;j++){
a[j] = a[j]*i;
a[j]= a[j-1]/10+a[j];
a[j-1] = a[j-1]%10;
if(a[j]>=10&&j>=k){
k++;
}
}
}
for(int i =k;i>=1;i--){
cout<<a[i];
}
return 0;
}
5*.高精度计算之阶乘和
#include<bits/stdc++.h>
using namespace std;
int a[10001], sum[10001], n;
void getsum(int a[], int b[]) {
int tem[10001] = { 0 };
int x = 0;
for (int i = 1; i <= 10001; i++) {
tem[i] = a[i] + b[i] + x;
x = tem[i] / 10;
tem[i] %= 10;
}
for (int i = 1; i <= 10001; i++) {
b[i] = tem[i];
}
}
int main() {
cin >> n;
for (int i = 1; i <= n; i++) {
memset(sum, 0, sizeof(sum));
a[1] = 1; int k = 1;
for (int j = 1; j <= i; j++) {
for (int p = 1; p <= k; p++) {
a[p] = a[p] * j;
a[p] = a[p - 1] / 10 + a[p];
a[p - 1] = a[p - 1] % 10;
if (a[p] >= 10 && p >= k) {
k++;
}
}
}
getsum(a, sum);
}
int t = 10001;
while (sum[t] == 0) {
t--;
}
for (int i = t; i >= 1; i--) {
cout << sum[i];
}
return 0;
}
#include<stdio.h>
#define N 10000
int main()
{
int i, j, x, k, n, b[N] = { 0 };
scanf("%d", &n);
for (k = 1; k <= n; k++)
{
int a[N] = { 0 };
a[9999] = 1;
for (i = 1, x = 0; i <= k; i++) {
for (j = 9999; j >= 0; j--)
{
a[j] = a[j] * i + x;
x = a[j] / 10;
a[j] = a[j] % 10;
}
}
for (j = 9999; j >= 0; j--)
{
b[j] = b[j] + a[j];
if (b[j] >= 10)
{
b[j - 1] = b[j - 1] + 1;
b[j] = b[j] - 10;
}
}
}
for (i = 0; i < N; i++)
if (b[i] != 0) break;
for (x = i; x < N; x++)
printf("%d", b[x]);
return 0;
}
6.大整数乘法
#include<bits/stdc++.h>
using namespace std;
char a1[10001], b1[10001];
int a[10001], b[10001], c[10001];
int main() {
int lena, lenb, lenc;
cin >> a1 >> b1;
lena = strlen(a1);
lenb = strlen(b1);
for (int i = 0; i <= lena-1; i++) {
a[lena - i] = a1[i] - '0';
}
for (int i = 0; i <= lenb-1; i++) {
b[lenb - i] = b1[i] - '0';
}
lenc = lena + lenb;
for (int i = 1; i <= lena; i++) {
for (int j = 1; j <= lenb; j++) {
c[i + j - 1] += b[j] * a[i];
c[i + j] += c[i + j - 1] / 10;
c[i+j-1]%= 10;
}
}
lenc = lena + lenb;
while(c[lenc] == 0 && lenc > 0) {
lenc--;
}
for (int i = lenc; i >= 1; i--) {
cout << c[i];
}
return 0;
}
7.大整数除以13,输出商和余数
#include<bits/stdc++.h>
using namespace std;
char a1[10001];
int a[10001],b[101];
const int n = 13;
int x;
int main() {
cin >> a1;
int lena = strlen(a1);
for (int i = 1; i <= lena; i++) {
a[i] = a1[i - 1]-'0';
}
for (int i = 1, x = 0; i <= lena; i++) {
b[i] = (a[i] + x * 10) / 13;;
x = (a[i] + x * 10) % 13;
}
int len = 1;
while (b[len] == 0&&len<lena) {
len++;
}
for (int i = len; i <= lena; i++) {
cout << b[i];
}
cout << endl;
cout << x;
return 0;
}