ѧϰlinux programming(1)
¡¾1. linux applications ÓÐÁ½ÖÖÐÎʽ¡¿
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¡¾2. PATH¡¿
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/bin: binaries, programs used in booting the system
/usr/bin: user binaries, standard programs available to users
/usr/local/bin: local binaries, programs specific to an installation
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¡¾3. C compiler¡¿
ÔÚPOSIX-compliant system (POSIX: Portable Operating System Interface), C compiler is called c89.
in linux, c89, cc, gcc refer to the system c compiler.
¡¾4. first c program in linux¡¿
1) hello.c file content
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello World!\n");
}
2) compile
$gcc -o hello hello.c
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-o <file>£ºÊä³öµ½file,Èôδָ¶¨-o£¬ÔòdefaultÊä³öµ½a.out
Èç¹ûÒª²é¿´ÖмäÉú³ÉÎļþ£¬¿ÉÓÃgcc²ÎÊý -save-temps
$gcc -save-temps -o hello hello.c
$ls
hello hello.c hello.i hello.o hello.s
//ÒÔÉÏÉú³ÉµÄ4¸öÎļþ˵Ã÷¼û¡¾5.±àÒëϵͳ¡¿
3) execute
$./hello
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