fork download
copy 
  1. #include <stdio.h>
  2. #include <string.h>
  3.  
  4. int main()
  5. {
  6.     char arr[100], sign[10] = {0};
  7.     char* p;
  8.     double num[10] = {0};
  9.     int i=0,j=0,k=0,cnt=0;
  10.     double total=0,sum=0;
  11.     gets(arr);
  12.     for (p = arr; p <= arr + strlen(arr); ++p)
  13.     {
  14.         if (*p == '*' || *p == '/' || *p == '+' || *p == '-')
  15.         {
  16.  
  17.             num[i] = sum;
  18.             sign[i] = *p;
  19.             sum = 0;
  20.             ++i;
  21.         }
  22.  
  23.         if (*p >= '0' && *p <= '9')
  24.         {
  25.             sum *= 10;
  26.             sum += *p - '0';
  27.             if (p == arr + strlen(arr) - 1)
  28.               {
  29.                   num[i] = sum;
  30.               }
  31.         }
  32.  
  33.  
  34.     }
  35.     while(j<i)
  36.     {
  37.         if (sign[j] == '*' || sign[j] == '/')
  38.         {
  39.             if (sign[j] == '*')
  40.                 total = num[j] * num[j + 1];
  41.             if (sign[j] == '/')
  42.                 total = num[j] / num[j + 1];
  43.             num[j] = total;
  44.             for (k = j + 1; k <= i; ++k)
  45.                 num[k] = num[k + 1];
  46.             for (k = j; k < i; ++k)
  47.                 sign[k] = sign[k + 1];
  48.             ++cnt;
  49.             j = 0;
  50.         }
  51.         else
  52.             ++j;
  53.     }
  54.     j = 0;
  55.     while(i-cnt!=0)
  56.     {
  57.         if (sign[j] == '+')
  58.             total = num[j] + num[j + 1];
  59.         if (sign[j] == '-')
  60.             total = num[j] - num[j + 1];
  61.         num[j] = total;
  62.         for (k = j + 1; k <= i - cnt; ++k)
  63.             num[k] = num[k + 1];
  64.         for (k = j; k < i - cnt; ++k)
  65.             sign[k] = sign[k + 1];
  66.         ++cnt;
  67.     }
  68.     printf("%lf", num[0]);
  69.     return 0;
  70. }
  71.  
Success #stdin #stdout 0s 4520KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
0.000000
https://ideone.com/0M63CB
language:
C (gcc 8.3)
created:
3 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!