将输入的字符串的最后一位变成x，如 input abcd output abcx --------------- #include <stdio.h> int main(void) { char a[10], *p; p = a; scanf("%s",p); for ( ; *p !='\0' ; p++) ; p--; *p = 'X'; printf("%s",a); getch(); return 0; }

#include <stdio.h> int main(void){ int num, baiwei, shiwei, gewei, i, j; i = j = 0; for (num = 100; num < 999 ; ++num) { baiwei = num / 100; shiwei = (num - baiwei*100) / 10; gewei = num - baiwei*100 - shiwei *10; if ((baiwei != shiwei) &amp;&amp; (ba...