c语言算圆的面积#include int main(){double r,pi=3.14,c,s;scanf ("%f",&r);c=4*pi*r;s=pi*r*r;printf("%f,%f\n",c,s);return 0;}为什么输不出所要的答案?
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![c语言算圆的面积#include int main(){double r,pi=3.14,c,s;scanf (](/uploads/image/z/3688543-55-3.jpg?t=c%E8%AF%AD%E8%A8%80%E7%AE%97%E5%9C%86%E7%9A%84%E9%9D%A2%E7%A7%AF%23include+int+main%28%29%7Bdouble+r%2Cpi%3D3.14%2Cc%2Cs%3Bscanf+%28%22%25f%22%2C%26r%29%3Bc%3D4%2Api%2Ar%3Bs%3Dpi%2Ar%2Ar%3Bprintf%28%22%25f%2C%25f%5Cn%22%2Cc%2Cs%29%3Breturn+0%3B%7D%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BE%93%E4%B8%8D%E5%87%BA%E6%89%80%E8%A6%81%E7%9A%84%E7%AD%94%E6%A1%88%3F)
c语言算圆的面积#include int main(){double r,pi=3.14,c,s;scanf ("%f",&r);c=4*pi*r;s=pi*r*r;printf("%f,%f\n",c,s);return 0;}为什么输不出所要的答案?
c语言算圆的面积
#include
int main()
{
double r,pi=3.14,c,s;
scanf ("%f",&r);
c=4*pi*r;
s=pi*r*r;
printf("%f,%f\n",c,s);
return 0;
}
为什么输不出所要的答案?
c语言算圆的面积#include int main(){double r,pi=3.14,c,s;scanf ("%f",&r);c=4*pi*r;s=pi*r*r;printf("%f,%f\n",c,s);return 0;}为什么输不出所要的答案?
把 %f 改为 %lf
或者 把 double 改为 float
还有周长公式是2 * pi * r