1060 Are They Equal (25分)
题目
思路
定义结构体
struct fraction{
string f;
int index;
}
把输入的两个数先都转换为科学计数法，统一标准后再做比较，index表示指数
注意点
- 0或者0的各种形式
- 0.1， 0.01等
代码
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<vector>
#include<set>
#include<string>
using namespace std;
#define MAXN 101
struct fraction{
string f;
int index;
fraction(char s[], int len){
int pos = -1;
int num = -1;
int i = 0;
for(i=0;s[i]!='\0';i++){
if(num == -1 && s[i] != '0' && s[i] != '.'){
num = i;
}
if(s[i] == '.'){
pos = i;
}
}
if(num == -1){
f.append(len, '0');
index = 0;
return ;
}
if(pos != -1){
if(pos < num){
index = pos - num + 1;
}else{
index = pos - num;
}
}else{
index = i - num;
}
f = s;
if(pos != -1){
f.erase(pos, 1);
if(num > pos){
num--;
}
}
f = f.substr(num, f.length());
if(f.length() < len){
f.append(len-f.length(), '0');
}else{
f = f.substr(0, len);
}
}
};
void print(fraction f, int len) {
printf("0.%s*10^%d", f.f.c_str(), f.index);
}
bool compare(fraction f1, fraction f2, int len){
if(f1.index != f2.index){
return false;
}
if(f1.f != f2.f){
return false;
}
return true;
}
void toString(fraction f) {
printf("f = %s, index = %d \n", f.f.c_str(), f.index);
}
int main() {
int n;
char s1[MAXN], s2[MAXN];
scanf("%d %s %s", &n, s1, s2);
fraction f1(s1, n);
fraction f2(s2, n);
if(compare(f1, f2, n) == true){
printf("YES ");
print(f1, n);
} else{
printf("NO ");
print(f1, n);
printf(" ");
print(f2, n);
}
}