同上个问题

在写这个练习时

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#include <stdio.h>

#define Pi 3.14159f

int main(void)

{
float radius = 0.0f;
float diameter = 0.0f;
float circumference = 0.0f;
float area = 0.0f;
printf("Input the diameter of a table;");
scanf("%f", &diameter);

radius =diameter / 2.0f;
circumference = 2.0f*Pi*radius;
area = Pi*radius*radius;
printf("\nThe circumference is %.2f", circumference);
printf("\nThe area is %.2f ,area");

getchar();
return 0;

}

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scanf_s()   sanf()