| void floyd(void *map, const int node) | |
| { | |
| int (*e)[node][node] = (int (*)[node][node])map; | |
| for(int k=0; k<node; k++) | |
| for(int i=0; i<node; i++) | |
| for(int j=0; j<node; j++) | |
| if( (*e)[i][j] > (*e)[i][k] + (*e)[k][j] ) | |
| (*e)[i][j] = (*e)[i][k] + (*e)[k][j]; | |
| } |
| #include <stdint.h> | |
| #include <stdio.h> | |
| __uint128_t fibonacci(int n) | |
| { | |
| __uint128_t llast = 0; | |
| __uint128_t last = 1; | |
| __uint128_t sum = 0; | |
| for(int i=0; i<n; i++) { | |
| sum = llast + last; |
1.install tools:
sudo apt-get install libncurses-dev flex bison bc
sudo apt-get install gcc-arm-linux-gnueabi
2.make:
make ARCH=arm armemulator_defconfig
make O=./build ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- menuconfig
make O=./build ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j4
1.正确地保存编译内核产生的.config文件-使用make savedefconfig
2.Learning-Markdown (Markdown 入门参考)
3.linux内核分析--中断处理流程
4."make: write error: stdout" on parallel builds
5.linux kernel
6.udhcpc: socket(AF_PACKET,2,8): Address family not supported by protocol
7.Linux kernel的中断子系统之（二）：IRQ Domain介绍
8.应用调试之配置修改内核打印用户态段错误信
9.Debian GNU/Linux 安装手册
10.[Debian/Ubuntu清理硬盘空间的8个技巧
| git config --global https.proxy http://127.0.0.1:1080 | |
| git config --global https.proxy https://127.0.0.1:1080 | |
| git config --global --unset http.proxy | |
| git config --global --unset https.proxy | |
| npm config delete proxy |
| <?php | |
| //simple network player | |
| const PLAYER_URL = "http://ip.sococos.com:8080/playerdayhot.php"; | |
| while(1) { | |
| sleep(1); | |
| $data = file_get_contents(PLAYER_URL); | |
| if(false === $data) { |
| #include <stdio.h> | |
| int main(int argc, char **argv) { | |
| char *cmd = "arecord -D plughw:0 -f S16_LE -c 1 -r 16000 -t raw -q -"; | |
| char buf[256]; | |
| FILE *fp = popen(cmd, "r"); | |
| for (int i=0; i<16; i++) { | |
| int result = fread(buf, 1, sizeof(buf), fp); | |
| printf("read %d bytes\n", result); |
| AT+SAPBR=3,0,"Contype","GPRS"\0a | |
| AT+SAPBR=3,1,"APN","3GNET"\0a | |
| AT+SAPBR=1,1\0a | |
| AT+CNTPCID=1\0a | |
| AT+CNTP="ntp1.aliyun.com",32\0a | |
| AT+CNTP="120.25.115.20",32\0a | |
| AT+CNTP\0a |
