C語言根據(jù)協(xié)議分割獲取字符串單元

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協(xié)議做如下規(guī)定

規(guī)定數(shù)據(jù)協(xié)議:

序列號(hào)????長(zhǎng)度????狀態(tài)字????數(shù)據(jù)長(zhǎng)度???數(shù)據(jù)1???數(shù)據(jù)2????數(shù)據(jù)3

以空格作為數(shù)據(jù)單元。
例如：

00001?00007?1???3??34567?26358?32698???
?(1)???(2)?(3)?(4)??(5)???(6)???(7)

以上各個(gè)編號(hào)字段代表的基本含義如下：

(1)00001就是數(shù)字1，即代表序列號(hào)為1

(2)00007就是數(shù)字7，即代表長(zhǎng)度為7

(3)1代表狀態(tài)字

(4)3代表數(shù)字長(zhǎng)度

(5)34567代表數(shù)據(jù)1

(6)26358代表數(shù)據(jù)2

(7)32698代表數(shù)據(jù)3

這樣就找到規(guī)律了，假設(shè)數(shù)據(jù)都為整型或者負(fù)整型，我們就可以根據(jù)這個(gè)規(guī)則來實(shí)現(xiàn)以下代碼：

#include?
#include?
#include?
//根據(jù)空格拆分字符串?
int?partition(char?*src,?char?*par,?int?pos)
{
??int?i,j;
??i?=?pos;
??//取得一個(gè)非空字符?
??while(src[i]?==?'?')
????++i;
??if(src[i]?!=?'\0')
??{
????j?=?0;
????while((src[i]?!=?'\0')?&&?(src[i]?!=?'?'))
????{
????????//判斷條件是否滿足?
????????if((src[i]?>?'9')?||?(src[i]?'0')?&&?(src[i]?!=?'-'))
????????????return?-1?;
??????par[j]?=?src[i];
??????++i;
??????++j;
????}
????par[j]='\0';
????return?i;
??}
??else
????return?-1;
}

int?main(void)
{
????int?serial_number?;
????int?lenght?;
????int?status?;
????int?data_length;
????int?data1,data2,data3;?

????int?position?=?0;
????int?para_flag?=?1?;?
????int?parameter_item?=?0;
????char?partition_string[20]?=?{0};
????char?*data?=?"00001?00007?1?3?34567?26358?32698";?
????while(para_flag)
????{
????????if(para_flag?==?0)
????????????break?;?
????????if((position?=?partition(data,partition_string,position))?!=?-1)
????????{
????????????++parameter_item?;
????????????switch(parameter_item)
????????????{
????????????????case?1:
????????????????????serial_number?=?atoi(partition_string);
????????????????????break?;
????????????????case?2:
????????????????????lenght?=?atoi(partition_string);
????????????????????break?;
????????????????case?3:
????????????????????status?=?atoi(partition_string);????
????????????????????break?;
????????????????case?4:
????????????????????data_length?=?atoi(partition_string);???
????????????????????break?;
????????????????case?5:
????????????????????data1?=?atoi(partition_string);?
????????????????????break?;
????????????????case?6:
????????????????????data2?=?atoi(partition_string);?
????????????????????break?;
????????????????case?7:?
????????????????????data3?=?atoi(partition_string);?
????????????????????para_flag?=?0?;
????????????????????break?;
????????????}
????????}
????}
????printf("序號(hào):%d\n",serial_number);
????printf("長(zhǎng)度:%d\n",lenght);
????printf("狀態(tài)字:%d\n",status);
????printf("數(shù)據(jù)長(zhǎng)度:%d\n",data_length);
????printf("數(shù)據(jù)1:%d\n",data1);
????printf("數(shù)據(jù)2:%d\n",data2);
????printf("數(shù)據(jù)3:%d\n",data3);
????return?0;???
}?

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