第 30 題 - 解答

#include <stdio.h>

int main()

{

    int i; 

    char string[1024], ch;

    printf("輸入字串：");

    scanf("%s", string);

    printf("編碼後為");

    i=0; 

    while(string[i]!='\0'){

        ch=string[i];

        if(ch>='A' && ch<='Z') 

            string[i]='A'+'Z'-ch;

        else

            string[i]='a'+'z'-ch;    

        i++;

    }

    printf("%s", string);

    return 0;

}

#include <stdio.h>

int main()

{

    int i; 

    char string[1024], ch;

    scanf("%s", string);

    i=0; 

    while(string[i]!='\0'){

        ch=string[i];

        if(ch>='A' && ch<='Z') 

            string[i]='A'+'Z'-ch;

        else

            string[i]='a'+'z'-ch;    

        i++;

    }

    printf("%s", string);

    return 0;

}