(Translate from Assembly to C) Rewrite the main function in C. Write the function's prototype and all code contained within. Don't forget about arguments and local variable definitions:

push rbp mov rbp,rsp sub rsp,0x20 mov DWORD PTR [rbp-0x14],edi mov QWORD PTR [rbp-0x20],rsi mov DWORD PTR [rbp-0xc],0x1a2b3c4d lea rax,[rbp-0xc] mov QWORD PTR [rbp-0x8],rax mov DWORD PTR [rbp-0x10],0x0 mov rax,QWORD PTR [rbp-0x8] movzx eax,BYTE PTR [rax] movsx eax,al shl eax,0x18 mov edx,eax mov rax,QWORD PTR [rbp-0x8] add rax,0x1 movzx eax,BYTE PTR [rax] movsx eax,al shl eax,0x10 or edx,eax mov rax,QWORD PTR [rbp-0x8] add rax,0x2 movzx eax,BYTE PTR [rax] movsx eax,al shl eax,0x8 or edx,eax mov rax,QWORD PTR [rbp-0x8] add rax,0x3 movzx eax,BYTE PTR [rax] movsx eax,al or eax,edx mov DWORD PTR [rbp-0x10],eax mov edx,DWORD PTR [rbp-0x10] mov eax,DWORD PTR [rbp-0xc] mov esi,eax mov edi,0x400644 ; "a = %#x b = %#x " mov eax,0x0 call 400400 mov eax,0x0 leave ret nop WORD PTR cs:[rax+rax*1+0x0] nop DWORD PTR [rax+rax*1+0x0]