Thread: search char array for specific characters and replace with another

Try something like this:

Code:

int main(void){
   char arrayDna[MAXSIZE];
   while(1) {
      printf("Enter a DNA sequence consisting of A's, T's, G's, and C's or 'exit' to exit:\n");
      scanf("%s", arrayDna);
      if (strcmp(arrayDna, "exit") == 0)
         break;
      printf("The compliment DNA sequence is:");
      arrayRev( arrayDna );
      printf("\n");
      arrayCount( arrayDna );
      arrayStart( arrayDna );
      arrayStop( arrayDna );
   }
   return 0;
}

Also, a DNA complement is spelled with an 'e', not an 'i'.