C/C++ 实现字符串IP与整数型IP的相互转换

#include <stdio.h>
int main()
{
	char ip[32] = "192.168.1.151";  	//IP值
	char scIPAddress[32] = "";			//存储字符串IP
	unsigned int nIPAddress = 0;		//存储整形IP
	int nTmpIP[4] = {0};				//分割IP
	int i=0;

	//整形转字符串
	sscanf(ip,"%d.%d.%d.%d",&nTmpIP[0],&nTmpIP[1],&nTmpIP[2],&nTmpIP[3]);
	for(i=0;i<4;i++)
	{
		nIPAddress += (nTmpIP[i]<<(24-(i*8))  & 0xFFFFFFFF);
	}
	//输出
	printf("整形IP：%u\r\n",nIPAddress);

	//字符串转整形
	sprintf(scIPAddress,"%d.%d.%d.%d", nIPAddress>> 24, (nIPAddress & 0xFF0000) >> 16, (nIPAddress & 0xFF00) >> 8, nIPAddress & 0xFF);
	//输出
	printf("字符串IP：%s\r\n",scIPAddress);

	return 0;
}

效果图：