Question

用C语言做/*求 s=1+2+4+6+…..100 的值*/

Answer 1

#include'"stdio.h"
void main()
{
int sum=1,i=2;
for(i=2;i<=100;)
{
sum+=i;
i=i+2;
}
printf("1+2+4+6+......+100=");
printf("%d",sum);

}

Answer 2

#include<stdio.h>
void main()
{
int s;
s=100*(100+1)/2;
printf("1+2+4+6+…..100=%d\n",s)
}

Answer 3

#include <stdio.h>
int main()
{
int s=0;
for (int i=1;i<=100;i++)
s+=i;
printf("%d",s);
return 0;

}