C Using array values erases array - c

Question

I am confused, when i use array values to assign another array values. the original array deletes the values used
int main(int argc, char *argv[]) {
char original[ORIGINAL_SIZE];
int isbn[ISBN_SIZE];
int index = 0;
int code;
int weight = 10;
int weightedValue;
int weightedSum = 0;
printf("Enter an ISBN to validate: ");
validateISBNArray(original);
while(index < ORIGINAL_SIZE){
if(original[index] != '-'){
if(original[index] == 'x' || original[index] == 'X') isbn[index] = 10;
else if(original[index] == 0) isbn[index] = 0;
else isbn[index] = original[index]-48;
code = isbn[index];
//printf("%d", code);
weightedValue= code*weight;
weight--;
weightedSum += weightedValue;
}
index++;
}
printf("%s",original);
if(weightedSum%11==0) printf("The ISBN %s, is VALID", original);
else printf("The ISBN %s, is NOT VALID", original);
return 0;
}
validateISBNArray has no effect on original array
this is the code for the not affecting function
void validateISBNArray(char array[]){
int index = 0;
int countDigits = 0;
int value = 0;
clearArray(array, ORIGINAL_SIZE);
scanf("%s",array);
while(index < ORIGINAL_SIZE){
//printf("%d %c %d\n", index, array[index], countDigits);
if(((array[index]-48) >= 0 && (array[index]-48) <= 9) || (array[index] == 'x'|| array[index] == 'X')) {
countDigits++;
index++;
}
else if(array[index] == '-' || array[index] == 0) index++;
else{
printf("INVALID CHARACTER %d = %c. Please Enter Digits Or/And Hyphens Only: ", index, array[index]);
index = 0;
countDigits = 0;
clearArray(array, ORIGINAL_SIZE);
scanf("%s",array);
}
if(index == ORIGINAL_SIZE && countDigits != 10){
printf("INVALID NUMBER OF DIGITS %d. Please Enter 10 Digits: ", countDigits);
index = 0;
countDigits = 0;
clearArray(array, ORIGINAL_SIZE);
scanf("%s",array);
}
}
//printf("%s", array);
}

Answer 1

Ok I fixed it removing the need for the isbn array
int main(int argc, char *argv[]) {
char original[ORIGINAL_SIZE];
int isbn[ISBN_SIZE];
int index = 0;
int code;
int weight = 10;
int weightedValue;
int weightedSum = 0;
printf("Enter an ISBN to validate: ");
validateISBNArray(original);
while(index < ORIGINAL_SIZE){
if(original[index] != '-'){
if(original[index] == 'x' || original[index] == 'X') code = 10;
else if(original[index] == 0) code = 0;
else code = original[index]-48;
weightedValue = code*weight;
weight--;
weightedSum += weightedValue;
}
index++;
}
if(weightedSum%11==0) printf("The ISBN %s, is VALID", original);
else printf("The ISBN %s, is NOT VALID", original);
return 0;
}