#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 */
double _rnd();
int /*<<< orphan*/ printf(char *, double);
int /*<<< orphan*/ sscanf(char *, char *, int *);
int main(int argc, char *argv[]) {
  int n;
  sscanf(argv[1], "%d", &n);
  for (int i = 0; i < n; i++) {
    printf("%.20f\n", _rnd());
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
lea    0xeab(%rip),%rsi
lea    -0x14(%rbp),%rdx
call   1040 <sscanf@plt>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    1192 <main+0x62>
mov    $0x0,%al
call   1050 <_rnd@plt>
lea    0xe84(%rip),%rdi
call   1030 <printf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    1165 <main+0x35>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    0x8(%rsi),%rdi
lea    0xec2(%rip),%rsi
lea    0x4(%rsp),%rdx
call   1040 <sscanf@plt>
cmpl   $0x0,0x4(%rsp)
jle    1178 <main+0x48>
lea    0xead(%rip),%rbx
xor    %ebp,%ebp
nopl   0x0(%rax,%rax,1)
xor    %eax,%eax
call   1050 <_rnd@plt>
mov    %rbx,%rdi
call   1030 <printf@plt>
add    $0x1,%ebp
cmp    0x4(%rsp),%ebp
jl     1160 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [7 x i8] c"%.20f\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i8**, i8*** %5
%9 = getelementptr inbounds i8*, i8** %8, i64 1
%10 = load i8*, i8** %9
%11 = call i32 @sscanf(i8* %10, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %6)
store i32 0, i32* %7
br label %12
12: ; preds = %19, %2
%13 = load i32, i32* %7
%14 = load i32, i32* %6
%15 = icmp slt i32 %13, %14
br i1 %15, label %16, label %22
16: ; preds = %12
%17 = call double (...) @_rnd()
%18 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), double %17)
br label %19
19: ; preds = %16
%20 = load i32, i32* %7
%21 = add nsw i32 %20, 1
store i32 %21, i32* %7
br label %12
22: ; preds = %12
%23 = load i32, i32* %3
ret i32 %23
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [7 x i8] c"%.20f\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = alloca i32
%4 = bitcast i32* %3 to i8*
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = call i32 @sscanf(i8* %6, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %3)
%8 = load i32, i32* %3
%9 = icmp sgt i32 %8, 0
br i1 %9, label %11, label %10
10: ; preds = %11, %2
ret i32 0
11: ; preds = %2, %11
%12 = phi i32 [ %15, %11 ], [ 0, %2 ]
%13 = call double (...) @_rnd()
%14 = call i32 @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), double %13)
%15 = add nuw nsw i32 %12, 1
%16 = load i32, i32* %3
%17 = icmp slt i32 %15, %16
br i1 %17, label %11, label %10
}