{

Invalid change (integer);

int num

Printf ("Please enter this number:");

scanf("%d "，& ampnum)；

Printf ("The hexadecimal form of this number is 0x%x\n", num);

//Directly output an integer in hexadecimal form.

Change (number);

}

Invalid change (integer)

{ char num 1[ 10]；

sprintf(num 1，“%x”，s)；

//Function //sprintf () saves variables in the specified format into a string.

Printf ("The hexadecimal form of this number is 0x%s\n", num1);

}

Description:

%d output integers in decimal form.

%o Output integers in octal form.

%x output integer in hexadecimal form of 16.