C语言指针实现小于8位数字加密加密规则如下:首先先将数据倒序,然后将每位数字都加上5,再用和除以10

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#include
#include
#include
#include
main()
{char *input_number = NULL,*temp = NULL,*p = NULL;;
char c;
int i = 0,num = 0;
input_number = (char *)malloc(10);
memset(input_number,0,10);
temp = (char *)malloc(10);
memset(temp,0,10);
printf(请输入8位数字:\n);
/*输入要加密的数据*/
while(i {c = getchar();
if(c = '0')/*只从中取整数*/
{input_number[i] = c;
i++;}}input_number[i] = '\0';
p = &input_number[7];
/*将输入的数据倒序存储*/
i = 0;while(i {temp[i] = *p;
p --;i ++;}temp[i] = '\0';
/*加密运算*/
i = 0;for(i = 0; i {num = temp[i] - 48;/*字符转换为整形*/
num = num + 5;
num = num % 10;
temp[i] = num + 48;/*整形转换为字符*/
}/*第一位和最后一位数据交换*/
p = temp;
temp[8] = *p;
temp[0] = num + 48;/*得到结果*/sprintf(input_number,%s,temp);printf(input_number = %s\n,input_number);/*释放*/if(NULL != temp){free(temp);temp = NULL;}if(NULL != input_number){free(input_number);input_number = NULL;}return 0;}