Check if user input into an array is too long?

Question

I am getting the user to input 4 numbers. They can be input: 1 2 3 4 or 1234 or 1 2 34 , etc. I am currently using

int array[4];
scanf(\"%1x%1x%1x%1x\", &ar         


        

Answer 1

E.g

#include 

int main(void){
    int array[4], ch;
    size_t i, size = sizeof(array)/sizeof(*array);//4  

    i = 0;
    while(i < size){
        if(1!=scanf("%1x", &array[i])){
             //printf("invalid input");
             scanf("%*[^0123456789abcdefABCDEF]");//or "%*[^0-9A-Fa-f]"
        } else {
            ++i;
        }
    }
    if('\n' != (ch = getchar())){
        printf("Extra input !\n");
        scanf("%*[^\n]");//remove extra input
    }
    for(i=0;i