Question

c语言编程，求π的近似值

#include <stdio.h>
#include <math.h>

void main()
{
int x,z;
float y;
y=0;
z=0;
for(x=1;fabs(1/x)>1e-6;x+2)
{
z=z+1;
if(z%2==0)
{
y=y+1/x;
}
else
{
y=y-1/x;
}
}
y=y*4;
printf("π=%10.6f\n",y);
}
求大神帮忙看看哪里有问题QAQ新手刚入门几天完全不会调试

Answer 1

#include <stdio.h>

#include <math.h>

int main()

{

int x,z;

float y;

y=0;

z=0;

for(x=1;fabs(1.0/x)>1e-6;x+=2)

{

z=z+1;

if(z%2!=0)

{

y=y+1.0/x;

}

else

{

y=y-1.0/x;

}

}

y=y*4;

printf("π=%10.6f\n",y);

return 0;

}

追问

卧槽谢谢大神！不过为什么是x+=2??