十进制的VC++圆面积计算器源代码，界面可视化，只需要输入圆的半径，就可以快速计算出圆的面积。VC源码下载，相对完整，可直接编译生成EXE-Decimal VC++ round area calculator source code, visual interface, only need to input the radius of the circle, can quickly calculate the area of a circle. VC source code, relativel