CODEWITHSUNDEEP
cstring
Miraz
Miraz

Reputation: 343

Conversion of very large string to integer format

I have a string of 200 characters( all of the characters are either 0 or 1) in input. Need a way to convert the characters to int format and store them in an array or variable.

Example: "00101110010..." -> 00101110010...

the code snippet below only works for <=20 character string.

    scanf("%u", &digit_num);   //number of digits in input number/string
    unsigned input_binary[digit_num]; //where the integers will be stored as individual digit
    unsigned long long temp; //temporary storage
    char crc[digit_num+1], *ptr=NULL;
    scanf(" %s", crc);
    temp=strtoull(crc,&ptr,10);
    for (unsigned j = 0; j < digit_num; j++)
    {
        input_binary[digit_num-j-1]=temp%10;
        temp/=10;
    }

Upvotes: 0

Views: 62

Answers (1)

Akaqlonist
Akaqlonist

Reputation: 115

for (unsigned j = 0; j < digit_num; j++)
{
  input_binary[j]=crc[j]-48;
}

ASCII of '0' is 48. char('3') - 48 = int(3)

Upvotes: 1

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