08/06/23 16:22:55
>>445
#include <stdio.h>
int main(void)
{
int N;
printf("入力");
scanf("%d", &N);
printf("1から%dの和は%d\n", N, (1+N)*N/2);
return 0;
}
08/06/23 16:22:55
>>445
#include <stdio.h>
int main(void)
{
int N;
printf("入力");
scanf("%d", &N);
printf("1から%dの和は%d\n", N, (1+N)*N/2);
return 0;
}