从零单排C-返璞归真

之前我们用了Jetbrain更现代的IDE进行了Hello World，总感觉少了点什么，这次我们用最原始的命令行重新来一次hello world

$ gcc -v
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple clang version 11.0.3 (clang-1103.0.32.29)
Target: x86_64-apple-darwin19.0.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

创建一个源码文件

$ vim helloc.c

#include

int main() {
    printf("Hello world!\n");
    return 0;
}

使用gcc进行编译

$ gcc helloc.c

就会生成可执行文件了

$ ls -l
drwxr-xr-x  6 junjiexun  staff   192B  4 16 22:49 a.out*
-rw-r--r--  1 junjiexun  staff    83B  4 16 22:56 helloc.c

直接运行就行

$ ./a.out
Hello world!