>>99
#include<stdio.h>
#include<string.h>
int main(void){
char *str = "abbaaabbbabba";
char alp = *str;
int i, iCnt = strlen(str);
for(i=1; i<iCnt; i++){
str++;
if(*str == alp)putchar('S');
else putchar('D');
alp = *str;
}
return 0;
}
ただしこっちの環境はBCC