求能看得懂的解答 for循环

float TestFor()
{
float count = 5.0;
float result1 = 1+11;
float result2 = 0;
for(int i = 0; i < 4; i--)
{
result1 = (count + countcount);
result2 += 1.0/count;
count--;
}
return result1result2；
}

int i,sum,a=0，b=0;
for(i=5;i>=1;i--)
{
a+=i+ii;
}
for(i=1;i<=4;i++)
{
b+=1/(i+1);
}
sum=ab;