已知函数double area(double x)用于求半径为x的圆面积 主函数调用该函数求圆面积 补充完整程序double area(double x ){double a;a=3.14*x*x;________________;}void main(){double a=5;printf("%lf",_____________________);}
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![已知函数double area(double x)用于求半径为x的圆面积 主函数调用该函数求圆面积 补充完整程序double area(double x ){double a;a=3.14*x*x;________________;}void main(){double a=5;printf(](/uploads/image/z/5754457-1-7.jpg?t=%E5%B7%B2%E7%9F%A5%E5%87%BD%E6%95%B0double+area%28double+x%29%E7%94%A8%E4%BA%8E%E6%B1%82%E5%8D%8A%E5%BE%84%E4%B8%BAx%E7%9A%84%E5%9C%86%E9%9D%A2%E7%A7%AF+%E4%B8%BB%E5%87%BD%E6%95%B0%E8%B0%83%E7%94%A8%E8%AF%A5%E5%87%BD%E6%95%B0%E6%B1%82%E5%9C%86%E9%9D%A2%E7%A7%AF+%E8%A1%A5%E5%85%85%E5%AE%8C%E6%95%B4%E7%A8%8B%E5%BA%8Fdouble+area%28double+x+%29%7Bdouble+a%3Ba%3D3.14%2Ax%2Ax%3B________________%3B%7Dvoid+main%28%29%7Bdouble+a%3D5%3Bprintf%28%22%25lf%22%2C_____________________%29%3B%7D)
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