簡單的將字串反向列印, 不做位置對調

 #include <stdio.h>

int main()

{

    char *str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

    // char *str = "9876543210";

    int i, max;

    i = 0;

    while (str[i] != '\0')

        i++;

    max = i;

    printf(">>%s\n", str);

    printf("=>");

    for (i = max - 1; i > 0; i--)

    {

        if (str[i] != '\0')

            printf("%c", str[i]);

    }

    if ((i == 0) && (str[i] != '\0'))

        printf("%c", str[i]);

    return 0;

}

[output]:

>>ABCDEFGHIJKLMNOPQRSTUVWXYZ

=>ZYXWVUTSRQPONMLKJIHGFEDCBA

[output]:

>>9876543210

=>0123456789