1073. Scientific Notation (20)

题目：https://www.patest.cn/contests/pat-a-practise/1073

代码：

#include<cstdio>  #include<cstring>  #include<cstdlib> #include<cmath>#include<stack>#include<string>#include<iostream>#include<algorithm>  using namespace std; int main()  {   char str[10010];gets(str);if(str[0]=='-'){   printf("-");}int len= strlen(str);int pos=0;while(str[pos]!='E'){   pos++;}int exp=0;for(int i= pos+2;i<len;i++){    exp=exp*10+(str[i]-'0');}if(exp==0){for(int i=1;i<pos;i++){   printf("%c",str[i]);}}if(str[pos+1]=='-'){printf("0.");for(int i=0;i<exp-1;i++){  printf("0");}printf("%c",str[1]);for(int i=3;i<pos;i++){   printf("%c",str[i]);}}else{for(int i=1;i<pos;i++){  if(str[i]=='.') continue;  printf("%c",str[i]);  if(i == exp+2&&pos-3!=exp){   printf(".");  }}for(int i=0;i<exp-(pos-3);i++){   printf("0");}}    system("pause");  }