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  1. #include <stdio.h>
  2. void input(float *);
  3. void calc(float *, float *, float *);
  4.  
  5. int main(void) {
  6. 	float r, l, a;
  7. 	input(&r);
  8. 	calc(&r, &l, &a);
  9. 	printf("周：%f\n面積：%f\n", l, a);
  10. 	return 0;
  11. }
  12.  
  13. void input(float *pt) {
  14. 	printf("半径：");
  15. 	scanf("%f", pt);
  16. }
  17.  
  18. void calc(float *ptr, float *ptl, float *pta) {
  19. 	*ptl = 3.14 * *ptr * 2;
  20. 	*pta = 3.14 * *ptr * *ptr;
  21. }
  22.  
Success #stdin #stdout 0s 4240KB
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半径：周：25.120001
面積：50.240002
https://ideone.com/EEjFAx
language:
C (gcc 8.3)
created:
3 years ago
visibility:
public

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