#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
float circle(float);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, float *);
int main() {
  float r, s;
  printf("ÇëÊäÈëÔ²µÄ°ë¾¶£º");
  scanf("%f", &r);
  printf("\n");
  s = circle(r);
  printf("Ô²µÄÃæ»ýÊÇ£º%f\n", s);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeba(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xecd(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1050 <scanf@plt>
lea    0xeda(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movss  -0x8(%rbp),%xmm0
call   1040 <circle@plt>
movss  %xmm0,-0xc(%rbp)
movss  -0xc(%rbp),%xmm0
cvtss2sd %xmm0,%xmm0
lea    0xe9a(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xeb8(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xecb(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
movss  0x4(%rsp),%xmm0
call   1050 <circle@plt>
cvtss2sd %xmm0,%xmm0
lea    0xea4(%rip),%rdi
mov    $0x1,%al
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [33 x i8] c"\C3\87\C3\AB\C3\8A\C3\A4\C3\88\C3\AB\C3\94\C2\B2\C2\B5\C3\84\C2\B0\C3\AB\C2\BE\C2\B6\C2\A3\C2\BA\00"
@.str.1 = [3 x i8] c"%f\00"
@.str.2 = [2 x i8] c"\0A\00"
@.str.3 = [28 x i8] c"\C3\94\C2\B2\C2\B5\C3\84\C3\83\C3\A6\C2\BB\C3\BD\C3\8A\C3\87\C2\A3\C2\BA%f\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca float
%3 = alloca float
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), float* %2)
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
%7 = load float, float* %2
%8 = call float @circle(float %7)
store float %8, float* %3
%9 = load float, float* %3
%10 = fpext float %9 to double
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([28 x i8], [28 x i8]* @.str.3, i64 0, i64 0), double %10)
ret i32 0
}

LLVM IR (-O2):
@.str = [33 x i8] c"\C3\87\C3\AB\C3\8A\C3\A4\C3\88\C3\AB\C3\94\C2\B2\C2\B5\C3\84\C2\B0\C3\AB\C2\BE\C2\B6\C2\A3\C2\BA\00"
@.str.1 = [3 x i8] c"%f\00"
@.str.3 = [28 x i8] c"\C3\94\C2\B2\C2\B5\C3\84\C3\83\C3\A6\C2\BB\C3\BD\C3\8A\C3\87\C2\A3\C2\BA%f\0A\00"
define i32 @main() {
%1 = alloca float
%2 = bitcast float* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), float* %1)
%5 = call i32 @putchar(i32 10)
%6 = load float, float* %1
%7 = call float @circle(float %6)
%8 = fpext float %7 to double
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([28 x i8], [28 x i8]* @.str.3, i64 0, i64 0), double %8)
ret i32 0
}