linux getopt使用之解析输入字符串和strtol和atoi使用

处理:
第二个参数有些东西: ：后面须接参数 -bxx和:: 后面可不接参数,后面多个选项,-mnzxc
argv[optind]:可以得到后面 -axx -bxx 后面这个-bxx的值，不过是string类型的.
optarg:得到是-a后面的值.

#include <stdio.h>
#include <unistd.h>
#include "task.h"

int main(int argc,char**argv)
{
	int ch = -1;
	char *string = "v::a::b::cdezgnmcv";
	int count = 0;
	while((ch=getopt(argc,argv,string))!=-1)
	{
	    printf(" is %c
",ch);
		printf("gain  is %s
",optarg);
		printf("optind is %d
",optind);
		printf("string optind is %s
",argv[optind]);
		printf("argc is %d
",argc);
		printf("argv is %s
",argv[1]);
		switch(ch)
		{
			case 'a':
				 printf("get opt ch is a
");
				 break;
		    case 'b':
				 printf("get opt ch is b
");
				 break;
			case 'c':
				 printf("get opt ch is c
");
				 break;
			case 'd':
				 printf("get opt ch is d
");
				 break;
			case 'n':
				 printf("get opt is n
");
				 break;
			case 'v':
				 printf(" string string gain is %s
",optarg);
				 break;
			default:
				 printf("unknow
");
				 break;
		}

		count++;
		printf("count is %d
",count);
		
	}
		count = 0;

	//printf("argc backward is %d
",argc);
	//task_create();
    //printf("argc forward is %d
",argc);
    
	while(1)
	{
		if( getchar() == 'x')
		{
			printf("main phread
 ");
            break;
		}
		
	}

	return 0;
	
}

　./sunshine  -v500  -b11　

is v
gain is 500
optind is 2
string optind is -b11
argc is 3
argv is -v500
string string gain is 500
count is 1
is b
gain is 11
optind is 3
string optind is (null)
argc is 3
argv is -v500
get opt ch is b
count is 2

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "task.h"

int main(int argc,char**argv)
{
	int ch = -1;
	char *string = "v::a::b::cdezgnmcv";
	int count = 0;
	int volume = -1;
	while((ch=getopt(argc,argv,string))!=-1)
	{
	    printf(" is %c
",ch);
		printf("gain  is %s
",optarg);
		printf("optind is %d
",optind);
		printf("string optind is %s
",argv[optind]);
		printf("argc is %d
",argc);
		printf("argv is %s
",argv[1]);
			
		volume   = strtol(optarg, NULL, 10); 
		volume   = atoi(optarg);
		printf("111111volume is1111111 %d
",volume);
		
		switch(ch)
		{
			case 'a':
				 printf("get opt ch is a
");
				 break;
		    case 'b':
				 printf("get opt ch is b
");
				 break;
			case 'c':
				 printf("get opt ch is c
");
				 break;
			case 'd':
				 printf("get opt ch is d
");
				 break;
			case 'n':
				 printf("get opt is n
");
				 break;
			case 'v':
				 printf(" string string gain is %s
",optarg);
				 break;
			default:
				 printf("unknow
");
				 break;
		}

		count++;
		printf("count is %d
",count);
		
	}
		count = 0;

	//printf("argc backward is %d
",argc);
	//task_create();
    //printf("argc forward is %d
",argc);
    
	while(1)
	{
		if( getchar() == 'x')
		{
			printf("main phread
 ");
            break;
		}
		
	}

	return 0;
	
}