ming0819 @ 2022-02-24 01:38:34
#include <iostream>
#include <math.h>
#include <typeinfo>
#include<math.h>
#include <cstdlib>
using namespace std;
int strisnum(string s)
{
string::iterator it;
it = s.begin();
if (*it<'0' || *it>'9')
return 0;
return 1;
}
int main() {
int n,count,a1=0,a2=0,flag=1;
string s1,s;
string::iterator it;
char temp,f[50],k;
cin>>n;
cin.ignore();
for(int i=0;i<n;i++){
getline(cin,s1);
if(!strisnum(s1)) temp=s1[0];
f[i]=temp;
s+=s1;
s+='\n';
}
for(int j=0;j<s.size();j++){
while(s[j]!='\n'){
k=s[j];
if(k>='a'&&k<='c') {
temp=s[j];
flag=1;
}else{
j-=2;
flag=0;
}
if(temp=='a'){
count=0;
int c1=0;
for(j+=2;s[j-1]!='\n'||!flag;j++){
flag=1;
k=s[j];
if(k==' '||s[j]=='\n') {
int c2=c1;
int k2=j;
for(int i=0;c2>0;c2--){
char t1=s[--k2];
int num=t1-'0';
a1+=pow(10,i)*num;
i++;
}
a2+=a1;
if(s[j]!='\n') {
c1=0;
a1=0;
cout<<'+';
}
}
else {
c1++;
cout<<s[j];
}
count++;
}
j--;
cout<<"="<<a2<<endl;
while(a2){
a2/=10;
count++;
}
cout<<count<<endl;
a2=0;
a1=0;
}
if(temp=='c'){
count=0;
int c1=0;
int a2=1;
for(j+=2;s[j-1]!='\n'||!flag;j++){
flag=1;
k=s[j];
if(k==' '||s[j]=='\n') {
int c2=c1;
int k2=j;
for(int i=0;c2>0;c2--){
char t1=s[--k2];
int num=t1-'0';
a1+=pow(10,i)*num;
i++;
}
a2*=a1;
if(s[j]!='\n') {
c1=0;
a1=0;
cout<<'*';
}
}
else {
c1++;
cout<<s[j];
}
count++;
}
j--;
cout<<"="<<a2<<endl;
while(a2){
a2/=10;
count++;
}
cout<<count<<endl;
a2=0;
a1=0;
}
if(temp=='b'){
count=0;
int c1=0;
int a2=0;
int flag2=1;
for(j+=2;s[j-1]!='\n'||!flag;j++){
flag=1;
k=s[j];
if(k==' '||s[j]=='\n') {
int c2=c1;
int k2=j;
for(int i=0;c2>0;c2--){
char t1=s[--k2];
int num=t1-'0';
a1+=pow(10,i)*num;
i++;
}
flag2--;
if(flag2==0){
a2=a1;
}else{
a2-=a1;
}
if(s[j]!='\n') {
c1=0;
a1=0;
cout<<'-';
}
}
else {
c1++;
cout<<s[j];
}
count++;
}
j--;
cout<<"="<<a2<<endl;
if(a2<0) count++;
while(a2){
a2/=10;
count++;
}
cout<<count<<endl;
a2=0;
a1=0;
}
}
}
}by Jasper08 @ 2022-03-16 15:14:37
@ming0819
//P1957 口算练习题
#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <cstdio>
#include <cstring>
using namespace std;
const int N = 100010;
int nsize(int n) // 计算一个数字的大小
{
if (n == 0)
return 1;
int i = 0;
if (n < 0)
n = 0 - n, i++;
while (n >= 1)
{
n /= 10;
++i;
}
return i;
}
int change(string a) //从字符串转为数字
{
int n = 0;
for (int i = 0; i < a.size(); ++i)
n += (a[i] - '0') * pow(10, a.size()-i-1);
return n;
}
int main()
{
int n;
cin >> n;
char op;
for (int i = 0; i < n; ++i)
{
string s;
cin >> s;
if (s[0] >= 'a' && s[0] <= 'c')
{
op = s[0];
int a, b;
cin >> a >> b;
if (op == 'a')
{
printf("%d+%d=%d\n", a, b, a+b);
cout << 2+nsize(a)+nsize(b)+nsize(a+b) << endl;
}
else if (op == 'b')
{
printf("%d-%d=%d\n", a, b, a-b);
cout << 2+nsize(a)+nsize(b)+nsize(a-b) << endl;
}
else
{
printf("%d*%d=%d\n", a, b, a*b);
cout << 2+nsize(a)+nsize(b)+nsize(a*b) << endl;
}
}
else
{
int a = change(s);
int b;
cin >> b;
if (op == 'a')
{
printf("%d+%d=%d\n", a, b, a+b);
cout << 2+nsize(a)+nsize(b)+nsize(a+b) << endl;
}
else if (op == 'b')
{
printf("%d-%d=%d\n", a, b, a-b);
cout << 2+nsize(a)+nsize(b)+nsize(a-b) << endl;
}
else
{
printf("%d*%d=%d\n", a, b, a*b);
cout << 2+nsize(a)+nsize(b)+nsize(a*b) << endl;
}
}
}
return 0;
}