#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 */
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, double *);
int main() {
  double a, b, c = 0;
  printf("a: ");
  scanf("%lf", &a);
  printf("b: ");
  scanf("%lf", &b);
  printf("c: ");
  scanf("%lf", &c);
  double average = (a + b + c) / 3.0;
  printf("Average: %.5lf\n", average);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
xorps  %xmm0,%xmm0
movsd  %xmm0,-0x20(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec0(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xeb4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea2(%rip),%rdi
lea    -0x18(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe84(%rip),%rdi
lea    -0x20(%rbp),%rsi
call   1040 <scanf@plt>
movsd  -0x10(%rbp),%xmm0
addsd  -0x18(%rbp),%xmm0
addsd  -0x20(%rbp),%xmm0
movsd  0xe58(%rip),%xmm1
divsd  %xmm1,%xmm0
movsd  %xmm0,-0x28(%rbp)
movsd  -0x28(%rbp),%xmm0
lea    0xe5b(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x20,%rsp
movq   $0x0,0x8(%rsp)
lea    0xed3(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xec9(%rip),%rbx
lea    0x18(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xeb9(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x10(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xea2(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
movsd  0x18(%rsp),%xmm0
addsd  0x10(%rsp),%xmm0
addsd  0x8(%rsp),%xmm0
divsd  0xe60(%rip),%xmm0
lea    0xe71(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"a: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [4 x i8] c"b: \00"
@.str.3 = [4 x i8] c"c: \00"
@.str.4 = [16 x i8] c"Average: %.5lf\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca double
%4 = alloca double
%5 = alloca double
store i32 0, i32* %1
store double 0.000000e+00, double* %4
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %3)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %4)
%12 = load double, double* %2
%13 = load double, double* %3
%14 = fadd double %12, %13
%15 = load double, double* %4
%16 = fadd double %14, %15
%17 = fdiv double %16, 3.000000e+00
store double %17, double* %5
%18 = load double, double* %5
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.4, i64 0, i64 0), double %18)
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"a: \00"
@.str.1 = [4 x i8] c"%lf\00"
@.str.2 = [4 x i8] c"b: \00"
@.str.3 = [4 x i8] c"c: \00"
@.str.4 = [16 x i8] c"Average: %.5lf\0A\00"
define i32 @main() {
%1 = alloca double
%2 = alloca double
%3 = alloca double
%4 = bitcast double* %1 to i8*
%5 = bitcast double* %2 to i8*
%6 = bitcast double* %3 to i8*
store double 0.000000e+00, double* %3
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %1)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %2)
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %3)
%13 = load double, double* %1
%14 = load double, double* %2
%15 = fadd double %13, %14
%16 = load double, double* %3
%17 = fadd double %15, %16
%18 = fdiv double %17, 3.000000e+00
%19 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.4, i64 0, i64 0), double %18)
ret i32 0
}