int decode(char *buf)
{
int ret = (buf[0] - '0') << 4 | (buf[1] - '0') << 3 | (buf[2] - '0') << 2 | (buf[3] - '0') << 1 | (buf[4] - '0');
return ret;
}
int main(int argc,char *argv[])
{
printf("请输入字符串n");
char inputBuf[256] ;
char outputBuf[256] = {0};
scanf("%s",inputBuf);
int i;
for(i=0;i
{
if(inputBuf[i] >= 'A' inputBuf[i] <= 'Z')
{
inputBuf[i] = '0';
}
else if(inputBuf[i] >= '0' inputBuf[i] <= '9')
{
inputBuf[i] = '1';
}
}
printf("输出：%sn",inputBuf);
int off = 0;
int num;
for(i=0;off < strlen(inputBuf);i++,off+=5)
{
num = decode(inputBuf+off);
outputBuf[i] = num % 26 + 'A';
}
outputBuf[i] = '';
printf("输出：%sn",outputBuf);
return 0;
}
第一个字符是大写字母才会出现这样的结果