#include <stdio.h>
int main(){
int a, b, x = 0, sum = 0;
if (a <= b){
do{
sum = sum + a;
a++;
x++;
} while (a <= b);
printf("%d以上%d以下の全整数の和は%dです。\n", a
- x
, b
, sum
); }
else{
do{
sum = sum + b;
b++;
x++;
} while (b <= a);
printf("%d以上%d以下の全整数の和は%dです。\n", b
- x
, a
, sum
); }
return 0;
}
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