c语言收索数组中存在的数

如果存在就输出这个数的索引

如果不存在就输出“这个数不存在

```
#include <stdio.h>
int search(int key,int a[],int length);
int main(viod)
{
	int a[]={2,4,6,7,1,3,5,9,11,13,23,14,32};
	int x;
	int loc;
	printf("请输入一个数字：");
	scanf("%d",&x);
	loc=search(x,a,sizeof(a)/sizeof(a[0]));
	if(loc!=-1){
		printf("%d在%d个位置上\n",x,loc);
		//TODO
	}else{
		printf("%d不存在\n",x);
	}
	return 0;
}
int search(int key,int a[],int length)
{
	int ret=-1;
	int i;
	for(i=0;i<length;i++){
		if(a[i]==key){
			ret=i;
			break;
			//TODO
		}
		//TODO
	}
	return ret;
}
```

”



c语言收索数组中存在的数

如果输入3就打印出所有三位数的水仙花数

```c
#include <stdio.h>
int main() {
	int n;
	scanf("%d", &n);
	int first = 1;
	int i = 1;
	while (i < n) {
		first *= 10;
		i++;
		//TODO
	}
	/*printf("first=%d\n",first);*/
	i = first;
	while (i < first * 10) {
		int t = i;
		int sum = 0;
		do {
			int d = t % 10;
			t /= 10;
			int p = d;
			int j = 1;
			while (j < n) {
				p *= d;
				j++;
				//TODO
			}
			sum += p;
		} while (t > 0);
		if (sum == i) {
			printf("%d\n", i);
			//TODO
		}
		i++;
	}
	return 0;
}
```

打印出来几位数的水仙花数

```c
#include <stdio.h>
int main() {
	int x;
	int one, two, five;
	scanf( "%d", &x);
	for ( one = 1; one < x*10; one++ ) {
		for ( two = 1; two < x * 10 / 2; two++ ) {
			for ( five = 1; five < x * 10 / 5; five++ ) {
				if ( one + two * 2 + five * 5 == x * 10 ) {
					printf("可以用%d个1角加%d个2角加%d个5角得到%d元\n",
					       one, two, five,x);
						   goto out;  
				}
			}
		}
	}
out:
	return 0;
}
```

c语言跳出循环goto用法

```c
#include <stdio.h>
int main() {
	int x;
	int cnt = 0;
	x = 1;
	while (cnt < 1000) {
		int i;
		int isPrime = 1;
		for (i = 2; i < x; i++) {
			if (x % i == 0) {
				isPrime = 0;
				break;
			}
		}
		if (isPrime == 1) {
			cnt ++;
			printf("%d\t", x);
			if (cnt % 5 == 0) {
				printf("\n");
			}
		}
		x++;
	}
	return 0;
}
```



c语言打印素素嵌套循环

#include <stdio.h>

int main()

{

	int x;

	x=0;

	scanf("%d",&x);

	int digit;

	int ret=0;

	

	while(x>0){

	digit=x%10;

	//printf("%d",digit);

	ret=ret*10+digit;

	printf("x=%d,digit=%d,ret=%d\n",x,digit,ret);

	x/=10;

	}

	

	return 0;

}

c语言数字倒序

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

int main()

{

	srand(time(0));

	int number = rand()%100+1;

	int count=0;

	int a=0;

	printf("我已经想好了一个1-100之间的数。");

	do {

		printf("请猜猜这个1-100之间数：");

		scanf("%d",&a);

		count ++;

		if(a>number){

			printf("你猜的数大了。");

			//TODO

		} else if (a<number){

			printf("你猜的数小了。");

			//TODO

		}

	}while(a!=number);

	printf("太好了，你用%d次就猜到了答案。\n",count);

	return 0;

}

c语言简单程序猜数字

2022新人报道

标识符

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备注

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请求信息

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请求头部

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发送请求头部

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服务端开始响应

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请求完成2024/04/26 10:11:40.529

 app无法登录，抓包数据。网页版可以登录，求分析求解

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拉取了rustbuster的v3.0.3版本文件, 二进制文件无法使用, 执行结果如下:

```bash
[root_cn@archlinux target]$ ./rustbuster-v3.0.3-x86_64-unknown-linux-gnu
./rustbuster-v3.0.3-x86_64-unknown-linux-gnu: error while loading shared libraries: libssl.so.1.1: cannot open shared object file: No such file or directory
```

拉取了main源码, 想自行尝试编译, 然后卡在了openssl, 以下为报错信息:

```rust
The following warnings were emitted during compilation:

warning: openssl-sys@0.9.47: build/expando.c:4:24: error: pasting "RUST_VERSION_OPENSSL_" and "(" does not give a valid preprocessing token
warning: openssl-sys@0.9.47:     4 | #define VERSION2(n, v) RUST_VERSION_##n##_##v
warning: openssl-sys@0.9.47:       |                        ^~~~~~~~~~~~~
warning: openssl-sys@0.9.47: build/expando.c:5:23: note: in expansion of macro ‘VERSION2’
warning: openssl-sys@0.9.47:     5 | #define VERSION(n, v) VERSION2(n, v)
warning: openssl-sys@0.9.47:       |                       ^~~~~~~~
warning: openssl-sys@0.9.47: build/expando.c:10:1: note: in expansion of macro ‘VERSION’
warning: openssl-sys@0.9.47:    10 | VERSION(OPENSSL, OPENSSL_VERSION_NUMBER)
warning: openssl-sys@0.9.47:       | ^~~~~~~

error: failed to run custom build command for `openssl-sys v0.9.47`

Caused by:
  process didn't exit successfully: `/mnt/d/work/file/rust/rustbuster/target/debug/build/openssl-sys-c5a482a9e0e49574/build-script-main` (exit status: 101)
  --- stdout
  cargo:rustc-cfg=const_fn
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
  OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
  OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=X86_64_UNKNOWN_LINUX_GNU_OPENSSL_DIR
  X86_64_UNKNOWN_LINUX_GNU_OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_DIR
  OPENSSL_DIR unset
  cargo:rustc-link-lib=ssl
  cargo:rustc-link-lib=crypto
  OPT_LEVEL = Some("0")
  TARGET = Some("x86_64-unknown-linux-gnu")
  HOST = Some("x86_64-unknown-linux-gnu")
  CC_x86_64-unknown-linux-gnu = None
  CC_x86_64_unknown_linux_gnu = None
  HOST_CC = None
  CC = None
  CFLAGS_x86_64-unknown-linux-gnu = None
  CFLAGS_x86_64_unknown_linux_gnu = None
  HOST_CFLAGS = None
  CFLAGS = None
  CRATE_CC_NO_DEFAULTS = None
  DEBUG = Some("true")
  CARGO_CFG_TARGET_FEATURE = Some("fxsr,sse,sse2")
  running: "cc" "-O0" "-ffunction-sections" "-fdata-sections" "-fPIC" "-g" "-fno-omit-frame-pointer" "-m64" "-Wall" "-Wextra" "-E" "build/expando.c"
  cargo:warning=build/expando.c:4:24: error: pasting "RUST_VERSION_OPENSSL_" and "(" does not give a valid preprocessing token
  cargo:warning=    4 | #define VERSION2(n, v) RUST_VERSION_##n##_##v
  cargo:warning=      |                        ^~~~~~~~~~~~~
  cargo:warning=build/expando.c:5:23: note: in expansion of macro ‘VERSION2’
  cargo:warning=    5 | #define VERSION(n, v) VERSION2(n, v)
  cargo:warning=      |                       ^~~~~~~~
  cargo:warning=build/expando.c:10:1: note: in expansion of macro ‘VERSION’
  cargo:warning=   10 | VERSION(OPENSSL, OPENSSL_VERSION_NUMBER)
  cargo:warning=      | ^~~~~~~
  exit status: 1

  --- stderr
  thread 'main' panicked at /home/root_cn/.cargo/registry/src/mirrors.sjtug.sjtu.edu.cn-4f7dbcce21e258a2/openssl-sys-0.9.47/build/main.rs:126:13:

  Header expansion error:
  Error { kind: ToolExecError, message: "Command \"cc\" \"-O0\" \"-ffunction-sections\" \"-fdata-sections\" \"-fPIC\" \"-g\" \"-fno-omit-frame-pointer\" \"-m64\" \"-Wall\" \"-Wextra\" \"-E\" \"build/expando.c\" with args \"cc\" did not execute successfully (status code exit status: 1)." }

  Failed to find OpenSSL development headers.

  You can try fixing this setting the `OPENSSL_DIR` environment variable
  pointing to your OpenSSL installation or installing OpenSSL headers package
  specific to your distribution:

      # On Ubuntu
      sudo apt-get install libssl-dev
      # On Arch Linux
      sudo pacman -S openssl
      # On Fedora
      sudo dnf install openssl-devel

  See rust-openssl README for more information:

      https://github.com/sfackler/rust-openssl#linux

  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
```

经过检查openssl与rust均为最新版本, 

```bash
[root_cn@archlinux target]$ sudo pacman -S rust
[sudo] password for root_cn:
warning: rust-1:1.77.2-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Package (1)  Old Version  New Version  Net Change

extra/rust   1:1.77.2-1   1:1.77.2-1     0.00 MiB

Total Installed Size:  249.41 MiB
Net Upgrade Size:        0.00 MiB

:: Proceed with installation? [Y/n] n
[root_cn@archlinux target]$ sudo pacman -S openssl
warning: openssl-3.2.1-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...

Package (1)   Old Version  New Version  Net Change

core/openssl  3.2.1-1      3.2.1-1        0.00 MiB

Total Installed Size:  11.45 MiB
Net Upgrade Size:       0.00 MiB

:: Proceed with installation? [Y/n] n
```

在网上找了一下, 查到资料, 在[rust-openssl的issues](https://github.com/sfackler/rust-openssl/issues/1227)中提到类似报错, 得到解释如下:

> If you are cross compiling to MUSL, you either need to point openssl-sys to the location that you have a copy of OpenSSL cross compiled to MUSL, or tell it to build a copy of OpenSSL itself with the vendored feature.
>
>	如果你是交叉编译到MUSL，你需要将openssl-sys指向你有一个交叉编译到MUSL的OpenSSL副本的位置，或者告诉它用vendored特性构建一个OpenSSL本身的副本。

由于不会rust, 依靠关键词"交叉编译"+"cargo"搜索到了[cargo交叉编译rust程序](https://blog.csdn.net/tyc880616/article/details/104371502), 顺着找到文件:

```
[root_cn@archlinux .cargo]$ cat ~/.cargo/config
[source.crates-io]
replace-with = 'sjtu' # 指定使用下面哪个源，修改为source.后面的内容即可

# 中国科学技术大学
[source.ustc]
registry = "https://mirrors.ustc.edu.cn/crates.io-index"

# 上海交通大学
[source.sjtu]
registry = "https://mirrors.sjtug.sjtu.edu.cn/git/crates.io-index/"

# 清华大学
[source.tuna]
registry = "https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git"

# rustcc社区
[source.rustcc]
registry = "https://code.aliyun.com/rustcc/crates.io-index.git"
```

没有找到交叉编译的设置, 由于本人不会rust, 线索断了, 尝试向大家寻求一波帮助, 非常感谢阅读.



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sqlmap -u "xxxxx.com/#/login" --all  --delay 1 --batch --random-agent

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