#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*/ fgets(char *, int, int /*<<< orphan*/);
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ sscanf(char *, char *, int *);
int /*<<< orphan*/ stdin;
int main(int argc, char *argv[]) {
  int n, i, j;
  char str[128];
  printf("Emaidazu karratuaren dimentsioa: ");
  fgets(str, 128, stdin);
  sscanf(str, "%d", &n);
  for (i = 0; i < n; i++) {
    for (j = 0; j < n; j++)
      printf("*");
    printf("\n");
  }
  printf("Sakatu \"return\" amaitzeko .....");
  fgets(str, 128, stdin);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0xa0,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xeb0(%rip),%rdi
call   1030 <printf@plt>
lea    -0xa0(%rbp),%rdi
mov    0x2e85(%rip),%rax
mov    (%rax),%edx
mov    $0x80,%esi
call   1040 <fgets@plt>
lea    -0xa0(%rbp),%rdi
lea    0xea5(%rip),%rsi
lea    -0x14(%rbp),%rdx
call   1050 <sscanf@plt>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    11e0 <main+0xb0>
movl   $0x0,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    11c6 <main+0x96>
lea    0xe72(%rip),%rdi
call   1030 <printf@plt>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    11a0 <main+0x70>
lea    0xe5a(%rip),%rdi
call   1030 <printf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    118d <main+0x5d>
lea    0xe42(%rip),%rdi
call   1030 <printf@plt>
lea    -0xa0(%rbp),%rdi
mov    0x2dee(%rip),%rax
mov    (%rax),%edx
mov    $0x80,%esi
call   1040 <fgets@plt>
xor    %eax,%eax
add    $0xa0,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
sub    $0x90,%rsp
lea    0xeae(%rip),%rdi
call   1040 <printf@plt>
mov    0x2e8a(%rip),%r14
mov    (%r14),%edx
lea    0x10(%rsp),%rbx
mov    %rbx,%rdi
mov    $0x80,%esi
call   1050 <fgets@plt>
lea    0xea8(%rip),%rsi
lea    0xc(%rsp),%rdx
mov    %rbx,%rdi
call   1060 <sscanf@plt>
mov    0xc(%rsp),%eax
test   %eax,%eax
jle    11d5 <main+0x95>
xor    %ebx,%ebx
jmp    11b5 <main+0x75>
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
mov    $0xa,%edi
call   1030 <putchar@plt>
add    $0x1,%ebx
mov    0xc(%rsp),%eax
cmp    %eax,%ebx
jge    11d5 <main+0x95>
test   %eax,%eax
jle    11a0 <main+0x60>
xor    %ebp,%ebp
nopl   0x0(%rax,%rax,1)
mov    $0x2a,%edi
call   1030 <putchar@plt>
add    $0x1,%ebp
cmp    0xc(%rsp),%ebp
jl     11c0 <main+0x80>
jmp    11a0 <main+0x60>
lea    0xe49(%rip),%rdi
call   1040 <printf@plt>
mov    (%r14),%edx
lea    0x10(%rsp),%rdi
mov    $0x80,%esi
call   1050 <fgets@plt>
xor    %eax,%eax
add    $0x90,%rsp
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [34 x i8] c"Emaidazu karratuaren dimentsioa: \00"
@stdin = global i32 0
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [2 x i8] c"*\00"
@.str.3 = [2 x i8] c"\0A\00"
@.str.4 = [32 x i8] c"Sakatu \22return\22 amaitzeko .....\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca [128 x i8]
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%10 = call i32 @printf(i8* getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
%11 = getelementptr inbounds [128 x i8], [128 x i8]* %9, i64 0, i64 0
%12 = load i32, i32* @stdin
%13 = call i32 @fgets(i8* %11, i32 128, i32 %12)
%14 = getelementptr inbounds [128 x i8], [128 x i8]* %9, i64 0, i64 0
%15 = call i32 @sscanf(i8* %14, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %6)
store i32 0, i32* %7
br label %16
16: ; preds = %32, %2
%17 = load i32, i32* %7
%18 = load i32, i32* %6
%19 = icmp slt i32 %17, %18
br i1 %19, label %20, label %35
20: ; preds = %16
store i32 0, i32* %8
br label %21
21: ; preds = %27, %20
%22 = load i32, i32* %8
%23 = load i32, i32* %6
%24 = icmp slt i32 %22, %23
br i1 %24, label %25, label %30
25: ; preds = %21
%26 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
br label %27
27: ; preds = %25
%28 = load i32, i32* %8
%29 = add nsw i32 %28, 1
store i32 %29, i32* %8
br label %21
30: ; preds = %21
%31 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
br label %32
32: ; preds = %30
%33 = load i32, i32* %7
%34 = add nsw i32 %33, 1
store i32 %34, i32* %7
br label %16
35: ; preds = %16
%36 = call i32 @printf(i8* getelementptr inbounds ([32 x i8], [32 x i8]* @.str.4, i64 0, i64 0))
%37 = getelementptr inbounds [128 x i8], [128 x i8]* %9, i64 0, i64 0
%38 = load i32, i32* @stdin
%39 = call i32 @fgets(i8* %37, i32 128, i32 %38)
ret i32 0
}

LLVM IR (-O2):
@.str = [34 x i8] c"Emaidazu karratuaren dimentsioa: \00"
@stdin = global i32 0
@.str.1 = [3 x i8] c"%d\00"
@.str.4 = [32 x i8] c"Sakatu \22return\22 amaitzeko .....\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = alloca [128 x i8]
%5 = bitcast i32* %3 to i8*
%6 = getelementptr inbounds [128 x i8], [128 x i8]* %4, i64 0, i64 0
%7 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([34 x i8], [34 x i8]* @.str, i64 0, i64 0))
%8 = load i32, i32* @stdin
%9 = call i32 @fgets(i8* %6, i32 128, i32 %8)
%10 = call i32 @sscanf(i8* %6, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%11 = load i32, i32* %3
%12 = icmp sgt i32 %11, 0
br i1 %12, label %13, label %28
13: ; preds = %2, %23
%14 = phi i32 [ %26, %23 ], [ %11, %2 ]
%15 = phi i32 [ %25, %23 ], [ 0, %2 ]
%16 = icmp sgt i32 %14, 0
br i1 %16, label %17, label %23
17: ; preds = %13, %17
%18 = phi i32 [ %20, %17 ], [ 0, %13 ]
%19 = call i32 @putchar(i32 42)
%20 = add nuw nsw i32 %18, 1
%21 = load i32, i32* %3
%22 = icmp slt i32 %20, %21
br i1 %22, label %17, label %23
23: ; preds = %17, %13
%24 = call i32 @putchar(i32 10)
%25 = add nuw nsw i32 %15, 1
%26 = load i32, i32* %3
%27 = icmp slt i32 %25, %26
br i1 %27, label %13, label %28
28: ; preds = %23, %2
%29 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([32 x i8], [32 x i8]* @.str.4, i64 0, i64 0))
%30 = load i32, i32* @stdin
%31 = call i32 @fgets(i8* %6, i32 128, i32 %30)
ret i32 0
}