Can it convert hex string (char []) to int ?

Converting hexadecimal strings to integers is a common operation, especially when dealing with programming and data processing. Here's a simple example demonstrating how to convert a hexadecimal string (char array) to an integer.

For example, in C, we can use the standard library function sscanf to perform this conversion. First, define a character array containing the hexadecimal number, then use the sscanf function to read the string and store the parsed hexadecimal value in an integer variable.

Below is the specific code example:

c
#include <stdio.h>

int main() {
    char hexString[] = "1A3F"; // This is a hexadecimal string
    int number;

    // Use sscanf to read the hexadecimal number from hexString
    sscanf(hexString, "%x", &number);

    // Output the converted integer
    printf("The integer value is %d\n", number);

    return 0;
}

In this example, hexString contains the hexadecimal string "1A3F". Using the %x format specifier, the sscanf function correctly parses the hexadecimal string and converts it to an integer stored in the number variable. In this example, the hexadecimal number 1A3F corresponds to the decimal value 6719.

This conversion is very useful in practical applications, such as processing network data or parsing information returned by hardware devices.