(Problem 1)Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of 3 or 5 below 1000.
题目大意:
10以下的自然数中,属于3和5的倍数的有3,5,6和9,它们之和是23.
找出1000以下的自然数中,属于3和5的倍数的数字之和。
#include <stdio.h>
#include <string.h>
#include <ctype.h> void solve()
{
int sum,i;
sum=;
for(i=; i<; i++)
{
if(i%== || i%==)
{
sum+=i;
}
}
printf("%d\n",sum); } int main()
{
solve();
return ;
}
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