Cancer2.c

int read_bin(){
    int n;
    printf("Digite Bin: ");
    scanf("%d",&n);
    int decimal = 0, i = 0, rem = 0;

    while(n != 0){
        rem = n % 10;
        if(rem == 1 || rem == 0){
            n /= 10;
            decimal += rem * pow(2, i);
        }
        else{
            printf("ERRO\n");
            return -1;
        }
    }
    return decimal;
}