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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4.  
  5. 	int a,b,i,num,ans;
  6.  
  7. 	printf("整数を入力してください\n");
  8. 	scanf("%d",&a);
  9. 	scanf("%d",&b);
  10. 	printf("1.足し算\n2.引き算\n3.掛け算\n4.割り算\n");
  11. 	printf("１～４のすうじを選んでください\n");
  12. 	scanf("%d",&num);
  13.  
  14. 	switch(num){
  15. 		case(1):
  16. 		    ans = a + b;
  17. 		    printf("答えは%dです\n",ans);
  18. 		    break;
  19. 		case(2):
  20. 		    ans = a - b;
  21. 		    printf("答えは%dです\n",ans);
  22. 		    break;
  23. 		case(3):
  24. 		    ans = a * b;
  25. 		    printf("答えは%dです\n",ans);
  26. 		    break;
  27. 		case(4):
  28. 		    ans = a / b;
  29. 		    printf("答えは%dです\n",ans);
  30. 		    break;		    
  31. 	}
  32. 	return 0;
  33. }
  34.  
Success #stdin #stdout 0s 5328KB
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4
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stdout
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整数を入力してください
1.足し算
2.引き算
3.掛け算
4.割り算
１～４のすうじを選んでください
答えは2です
https://ideone.com/Hwc7CO
language:
C (gcc 8.3)
created:
7 hours ago
visibility:
public

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