题解 | #整数与IP地址间的转换#
整数与IP地址间的转换
https://www.nowcoder.com/practice/66ca0e28f90c42a196afd78cc9c496ea
#include <stdio.h>
int main() {
unsigned int ip[4];
for (int i=0;i<4;i++){
scanf("%d.",&ip[i]);
// printf("%d\n",ip[i]);
}
unsigned int t = ip[0]<<24;
t = t+ip[3];
t = t+(ip[2]<<8);
t = t+(ip[1]<<16);
printf("%u",t);
int ip_num;
printf("\n");
scanf("%d",&ip_num);
ip[0] = ip_num>>24&(0xff);
ip[1] = ip_num>>16&(0xff);
ip[2] = ip_num>>8&(0xff);
ip[3] = ip_num&(0xff);
printf("%d.%d.%d.%d",ip[0],ip[1],ip[2],ip[3]);
return 0;
}
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