c语言代码解决问题

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<string.h>

int main()

{

char str[61],str1[61];

gets(str);

str[strlen(str)] = '\0';

int i,j=0;

for (i = 0; i < strlen(str); i++)

{

if (str[i] >= 'A' && str[i] <= 'Z')

str[i] = (char)(str[i] + 32);

else if (str[i] >= 'a' && str[i] <= 'z')

str[i] = (char)(str[i] - 32);

}

for (i = strlen(str)-1; i >= 0; i--)

{

str1[j] = str[i];

j++;

}

str1[j] = '\0';

for (i = 0; i < strlen(str1); i++)

{

if (str1[i] >= 'a' && str1[i] <= 'w' || str1[i] >= 'A' && str1[i] <= 'W')

{

str1[i] = str1[i] + 3;

}

else if (str1[i] >= 'x' && str1[i] <= 'z' || str1[i] >= 'X' && str1[i] <= 'Z')

str1[i] = str1[i] - 23;

}

puts(str1);

return 0;

}