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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #define macro(n) for(k=0;k<n;k++)sum+=1/(float)(k+1)
  4. int main(void)
  5. {
  6. 	int k,n;
  7. 	float sum = 0.0f;
  8. 	printf("請輸入第n項\n");
  9. 	scanf("%d", &n);
  10. 	printf("輸入的n為：%d\n",n);
  11. 	printf("計算1/1+1/2+1/3+‧‧‧+1/n的輸出結果為\n");
  12. 	macro(n);
  13. 	printf("sum = %f\n", sum);
  14. 	system("pause");
  15. 	return 0;
  16. }
  17.  
  18.  
Success #stdin #stdout #stderr 0.02s 5488KB
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stdin
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10000000
stdout
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請輸入第n項
輸入的n為：10000000
計算1/1+1/2+1/3+‧‧‧+1/n的輸出結果為
sum = 15.403683
stderr
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sh: 1: pause: not found
https://ideone.com/Rc2s94
language:
C (gcc 8.3)
created:
2 years ago
visibility:
public

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