Please tell me how to convert the 1 QString number string into the 16 QString number string.

There are two main methods, which are actually the use of existing functions:

Method 1: sscanf ()

Function name: sscanf

Function: Format string input.

Usage: int sscanf (char * string, char * format [,argument, ...]);

The above format of %x is to format the string as 16 hexadecimal number.

Example:

# include & ltstdio.h & gt

void main()

{

char * p = " 0x 1a "；

int nValude = 0；

sscanf(p，" %x "，& ampnValude)；

printf("%d\r\n "，nValude)；

}

Output:

Method 2: strtol ()

Function name: strtol

Function: Converts a string into an integer.

Usage: longstrtol (char * str, char * * endptr, intbase);

The cardinal number above is the decimal number we want to convert.

Example:

# include & ltstdio.h & gt

# include & ltstdlib.h & gt

void main()

{

char * p = " 0x 1b "；

char * str

long I = strtol(p & amp； str， 16)；

printf("%d\r\n "，I)；

}

Output: