,.,.,.,+3ACT,.,.,.,.-12,.,.,.,.,.,.,.,actgncgt
#OUTPUT
3
12

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
 
int main(){
  char tmp_array[100];
  const char* seq = "+1236,,..,,actgn+3ACT-4CCCC";
  printf("%s\n",seq);
 
  for(int i=0;i<strlen(seq);i++){
    if(seq[i]!='+'&&seq[i]!='-')
      continue;
    int j=i+1;
    while(j<strlen(seq)){
      if(seq[j]>='0' &&seq[j]<='9'){
	j++;
      }else
	break;
 
    }
    strncpy(tmp_array,seq+i+1,j-i-1);
    tmp_array[j-i-1]='\0';
    printf("numbers in substrings are: %d\n",atoi(tmp_array));
  }
 
  return 0;
}

int main()
{
  char tmp_array[100];
  const char* seq = "+1236,,..,,actgn+3ACT-4CCCC";
  printf("%s\n",seq);
 
   while (*seq)
   {        // pre-scan for +-
      if (*seq != '-' && *seq != '+')
      {
         seq++;
         continue;
      }
 
      char *p = tmparray;
	  *p++ = *seq++;
 
      while (*seq)
	  {
	      if ((*seq < '0') || ('9' < *seq))
		  { 
		     break;
	      }
 
          *p++ = *seq++;
	   }
 
       *p = 0;
 
       printf("numbers in substrings are: %d\n",atoi(tmp_array)); 
  } 
 
  return 0;
}

char string[100]="+1236,,..,,actgn+3ACT-4CCCC";
char *token, *ptr;
int value;
 
token = strtok(string,"+-");
printf ("found numbers: ");
 
while (token != NULL)
{	
	value = strtol(token,&ptr,10);
	if (ptr != token)
		printf(" %d,",value);
 
	token = strtok(NULL,"+-");
}
printf("\n");