main()
{int i,sum=0;
for(i=1;i<=10;i+=2)
sum+=i;
printf("%d\n",sum);
}
第二种
main()
{int i=1,sum=0;或i=0,sum=1;或i=0,sum =0;
while(i<=10)
{sum+=i;或i+=2;sum+=i;或i++;sum+=i;i+=1;
i+=2;
}
printf("%d\n",sum);
}
main()
{int i=1,sum=0;
do
{sum+=i;i+=2;这一步和上面的相同
}
while(i<=10);
printf("%d\n",sum);
} |