#include <stdio.h>
//練習問題D
int func(int n){
if(n == 0){
return -1;
}
return 3*func(n-1)+5;
}
int main(void) {
int n = 3,m;
m = func(n);
printf("数列anについて、n=%dの時の値は%d\n",n
,m
); return 0;
}
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