编辑代码

#include <stdio.h>
int main () {
    char s1[10]={"abcABC@"};
    char *p;
    //scanf("%s",s1);
    p=s1;
    while(*p!='@')
    {
        if(*p>='a' && *p<='z')
            *p=((*p-96)+3)%26+96;
        if(*p>='A' && *p<='Z')
            *p=((*p-64)+3)%26+96;
        p++;
    }
	puts(s1);
	return 0;
}