clude<stdio.h>
int main()
{
int x=2;
int a,b,count;
a=2;
b=count=1;
int n,m;
int number=0;
scanf("%d %d",&n,&m);
int sum1,sum2;
sum1=sum2=0;
while(n<count)
{
for(x=2;a<x;a++)
{
if(x%a==0)
{
b=0;
}
}
if(b==1){number++;
sum1+=sum1;
count++;
}
}
wlile(m<=count)
;{
for(x=2;a<x;a++)
{
if(x%a==0)
{
b=0;
}
}
if(b==1){number++;
sum2+=sum2;
count++;
}
}
printf("%d",sum2-sum1);
return 0;
}
怎么改
