CODEWITHSUNDEEP
cbcd
user7186318
user7186318

Reputation:

Converting an integer to 0x equivalent (Hex)

I have an integer input of 1991. How do I convert the input to 0x1991 instead of 7C7? I already wrote the code to convert the hex to decimal(the answer will be 6545)

int ui = 0x202;
int BCD(int value) //Converting 0xhex to decimal 
{
    int result = 0;
    result <<= 4;
    result |= ui % 10;
    ui /= 10;

    return value;
}

Upvotes: 0

Views: 2196

Answers (3)

pmg
pmg

Reputation: 108978

Build a string with the 0x prefix, then scan that.

int var, value = 1991;
char tmp[100];
sprintf(tmp, "0x%d", value);
if (sscanf(tmp, "%i", &var) != 1) /* error */;
printf("%d ==> %s ==> %d\n", value, tmp, var);

Upvotes: 1

Tibor Tak&#225;cs
Tibor Tak&#225;cs

Reputation: 4808

const int input = 1991;
int i = input;
int f = 1;
int result = 0x0;
while( i > 0 )
{
    int d = i % 10;
    result += d * f;
    f *= 16; 
    i /= 10;
}

printf("0x%x", result ); // 0x1991

Upvotes: 6

Scott Hunter
Scott Hunter

Reputation: 49803

You are using ui as the input and storing the result in result, but then returning value; you should be using value as the input and returning result.

Upvotes: 2

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