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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <ctype.h>
  4.  
  5. int main() {
  6.     char t[10];
  7.     char r[10];
  8.     fgets(t, 10, stdin);
  9.     int c = 0;
  10.     for (int i = 0; i < 10 && t[i] != 0; i++) {
  11.         if (isdigit(t[i]) || t[i] == 'i' || t[i] == 'p' || t[i] == '+' || 
  12.                 t[i] == '-' || t[i] == '*' || t[i] == '/' || t[i] == '^') {
  13.             r[c++] = t[i];
  14.         }
  15.     }
  16.     r[c] = '\0';
  17.     printf("%s", r);
  18. }
  19.  
Success #stdin #stdout 0s 2172KB
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3 5+2ia
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35+2i
https://ideone.com/wOi1S5
language:
C99 (gcc 8.3)
created:
7 years ago
visibility:
secret

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