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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <ctype.h>
  5. #include <stdbool.h>
  6. int main()
  7. {
  8.   int i = 0;
  9.   int j = 0;
  10.   //char str, str2, c;
  11.   //scanf("%s", &str);
  12.   //char a[100];
  13.  // gets(a);
  14.  char str[]={'a','b','c',' ','1','0',' ','3','2',' ','5','4'};
  15.  char a[]={'1', '2'};
  16.  char str2;
  17.   while ((str[i] != '\0')) 
  18.     {
  19.       if ((isdigit(str[i])) == true) //если цифра true
  20. 	{
  21. 	  str2 = strcat(str2,str[i]);
  22. 	}
  23.  
  24.       /*if ((isalpha(str[i])) == true) //если буква true
  25. 	{
  26.               str2 = '\0';
  27. 	} 
  28.  
  29.      if ((str[i]) == ' ')
  30. 	{
  31. 	  j = j + 1;
  32. 	  a[j] = str2;
  33. 	  str2 = '\0';
  34. 	}*/
  35.       //a[1] = str2;	
  36.       i = i+1;
  37.     }
  38.       printf("%s", a[1]);
  39.  
  40. 	return 0;
  41. }
Runtime error #stdin #stdout 0s 4460KB
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Standard input is empty
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Standard output is empty
https://ideone.com/WZ2vl8
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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