#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 *, char *);
int /*<<< orphan*/ scanf(char *, char *);
int main(int argc, char *argv[]) {
  char c[10];
  c[0] = '\0';
  char str[1024];
  scanf("%[1]", c);
  printf("%s\n", c);
  scanf("%[^:]", str);
  printf("%s\n", str);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x420,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
movb   $0x0,-0x1a(%rbp)
lea    -0x1a(%rbp),%rsi
lea    0xebf(%rip),%rdi
call   1040 <scanf@plt>
lea    -0x1a(%rbp),%rsi
lea    0xeb4(%rip),%rdi
call   1030 <printf@plt>
lea    -0x420(%rbp),%rsi
lea    0xea5(%rip),%rdi
call   1040 <scanf@plt>
lea    -0x420(%rbp),%rsi
lea    0xe8e(%rip),%rdi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x420,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
sub    $0x418,%rsp
movb   $0x0,0x6(%rsp)
lea    0xeca(%rip),%rdi
lea    0x6(%rsp),%rbx
mov    %rbx,%rsi
call   1040 <scanf@plt>
lea    0xebb(%rip),%r14
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
lea    0xead(%rip),%rdi
lea    0x10(%rsp),%rbx
mov    %rbx,%rsi
call   1040 <scanf@plt>
mov    %r14,%rdi
mov    %rbx,%rsi
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x418,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [5 x i8] c"%[1]\00"
@.str.1 = [4 x i8] c"%s\0A\00"
@.str.2 = [6 x i8] c"%[^:]\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i8**
%5 = alloca [10 x i8]
%6 = alloca [1024 x i8]
store i32 %0, i32* %3
store i8** %1, i8*** %4
%7 = getelementptr inbounds [10 x i8], [10 x i8]* %5, i64 0, i64 0
store i8 0, i8* %7
%8 = getelementptr inbounds [10 x i8], [10 x i8]* %5, i64 0, i64 0
%9 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* %8)
%10 = getelementptr inbounds [10 x i8], [10 x i8]* %5, i64 0, i64 0
%11 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %10)
%12 = getelementptr inbounds [1024 x i8], [1024 x i8]* %6, i64 0, i64 0
%13 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8* %12)
%14 = getelementptr inbounds [1024 x i8], [1024 x i8]* %6, i64 0, i64 0
%15 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %14)
ret i32 0
}

LLVM IR (-O2):
@.str = [5 x i8] c"%[1]\00"
@.str.1 = [4 x i8] c"%s\0A\00"
@.str.2 = [6 x i8] c"%[^:]\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca [10 x i8]
%4 = alloca [1024 x i8]
%5 = getelementptr inbounds [10 x i8], [10 x i8]* %3, i64 0, i64 0
store i8 0, i8* %5
%6 = getelementptr inbounds [1024 x i8], [1024 x i8]* %4, i64 0, i64 0
%7 = call i32 @scanf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i8* %5)
%8 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %5)
%9 = call i32 @scanf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i8* %6)
%10 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %6)
ret i32 0
}