我有这个问题:
parameter1.c: In function ‘main’:
parameter1.c:13:2: error: incompatible type for argument 2 of ‘Countcircumferenceofcircle’
parameter1.c:4:6: note: expected ‘double *’ but argument is of type ‘double’
这是代码:
#include <stdio.h>
#define phi 3.14
void Countcircumferenceofcircle(int radius, double *C) {
*C = 2*phi*radius;
}
int main (void) {
int r;
double Circumference;
printf("Insert radius:");
scanf("%d", &r);
Countcircumferenceofcircle(r, Circumference);
printf("Circumference=%f\n", Circumference);
return 0;
}
我需要你的帮助来解决这个问题。