将IP地址字符串形式拆成四个整数形式

/* 
* File: main.c
* Author: liutingting
*/

#include<stdio.h>
#include<stdlib.h>
#include<Winsock2.h> 
#include<string.h>
#include<time.h>
#include <Ws2tcpip.h>


#pragma comment(lib,"WS2_32.lib")


int main(int argc, char** argv) {
int i,j;
u_long count=0;
u_short datalen=0;
int    SZFH=0;
u_long    sumlen=0;
u_long    qc_sumlen=0;

char *filePath[3];
filePath[0]="C:\\Users\\Administrator\\Desktop\\1208test\\open.txt";

char storefile[]="C:\\Users\\Administrator\\Desktop\\store.txt";
char sip[20],dip[20],id[10];
int ip1=0,ip2=0,ip3=0,ip4=0;
FILE *fp[3],*out;

//可用于连续打开多个文件
for(i=0;i<1;i++)
{
//itoa(i,first,10);

while ((fp[i] = fopen(filePath[i], "r")) == NULL) {
printf("无法打开文件\n");
exit(0);
}
remove(storefile);
out=fopen(storefile,"a+");
char ch;
char line[100];


while (fgets(line, 100, fp[i])!=NULL) {
if(feof( fp[i])){//防止最后一行多读
break;
}
else
{
sscanf(line,"%s%s%s",id,sip,dip); //写入文件
fprintf(out,"%s    %s    %s\n",id,sip,dip);
printf("line=%s\n",line);
printf("id=%s    sip=%s    dip=%s\n",id,sip,dip);
int ipi=0;
int k;
ip1=0,ip2=0,ip3=0,ip4=0;
for(k=0;sip[k]!=‘\0‘;k++)
{
if(sip[k]==‘.‘)
{
ipi++;
continue;
}
switch(ipi)
{
case 0:
ip1=ip1*10+(sip[k]-48);
break;
case 1:
ip2=ip2*10+(sip[k]-48);
break;
case 2:
ip3=ip3*10+(sip[k]-48);
break;
case 3:
ip4=ip4*10+(sip[k]-48);
break; 

}
}
printf("%d    %d    %d    %d\n",ip1,ip2,ip3,ip4);


}
}
}

fclose(fp[0]);

fclose(out);
system("pause");
return EXIT_SUCCESS;
}