This topic studies the data output format in C language.

Two integer variables, m and n, are defined in the title. Assign values to these two variables. The input value is a hexadecimal integer, m = n ... m-n, after the operation, the value obtained by subtraction is assigned to m, and the value of m is output. Where the format character of printf is x, that is, the integer is output in hexadecimal form. Please note that 0x is a flag indicating that the number is hexadecimal. When outputting data, the hexadecimal flag is not automatically added in front of the data.