c语言求双精度浮点数的平均数

以下是C语言求双精度浮点数平均数的代码示例：

#include <stdio.h>

int main()
{
    double num1, num2, avg;
    printf("Enter two numbers: ");
    scanf("%lf %lf", &num1, &num2);

    avg = (num1 + num2) / 2;

    printf("Average = %.2lf", avg);
    return 0;
}

运行结果示例：

Enter two numbers: 3.5 4.5
Average = 4.00