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  1. #include <stdio.h>
  2. float enteredNumber;
  3. int numberOfLoop;
  4.  
  5. void addition(void);
  6. void subtraction(void);
  7. void multiplication(void);
  8. void division(void);
  9.  
  10. int main(void){ /* Start of the main function */
  11. 	char request;
  12.  
  13. 	printf("Please Enter the Sign Which Operation Do You Want:\n");
  14. 	printf("+ => Addition\n- => Subtraction\n* => Multiplication\n/ => Division");
  15. 	scanf("%c", &request); /* Give the value of the char type variable 'request' from the user */
  16.  
  17. 	switch (request){ /* Switch the variable named request to understand the selection. */
  18. 		case '+':
  19. 			addition();
  20. 			break;
  21. 		case '-':
  22. 			subtraction();
  23. 			break;
  24. 		case '*':
  25. 			multiplication();
  26. 			break;
  27. 		case '/':
  28. 			division();
  29. 			break;
  30. 		default: /* If the user entered an invalid char, print this message. */
  31. 			printf("The sign you entered was out of the list. Try Again.");
  32. 		} /* End of the switch-case */
  33.  
  34. 		return 0; /* main function returns 0 */
  35.  
  36. } /* End of the main function */
  37.  
  38.  
  39.  
  40. void addition(void){
  41. 	float additionResult = 0;
  42. 	printf("How many numbers do you want to add?: ");
  43. 	scanf("%d", &numberOfLoop);
  44. 	for(int start = 1; start<=numberOfLoop; start++){
  45. 		printf("Enter number %d", start);
  46. 		scanf("%f", &enteredNumber);
  47. 		additionResult += enteredNumber;
  48. 	}
  49. 	printf("The result is %f", additionResult);
  50. }
  51.  
  52. void subtraction(void){
  53. 	float subtractionResult;
  54. 	printf("Enter the main number which other numbers will be subtracted from: ");
  55. 	scanf("%f", &subtractionResult);
  56. 	printf("How many numbers do you want to subtract?: ");
  57. 	scanf("%d", &numberOfLoop);
  58. 	for(int start = 1; start<=numberOfLoop; start++){
  59. 		printf("Enter number %d", start);
  60. 		scanf("%f", &enteredNumber);
  61. 		subtractionResult -= enteredNumber;
  62. 	}
  63. 	printf("The result is %f", subtractionResult);
  64. }
  65.  
  66. void multiplication(void){
  67. 	float multiplicationResult = 1;
  68. 	printf("How many numbers do you want to multiply?: ");
  69. 	scanf("%d", &numberOfLoop);
  70. 	for(int start = 1; start<=numberOfLoop; start++){
  71. 		printf("Enter number %d", start);
  72. 		scanf("%f", &enteredNumber);
  73. 		multiplicationResult *= enteredNumber;
  74. 	}
  75. 	printf("The result is %f", multiplicationResult);
  76. }
  77.  
  78. void division(void){
  79. 	float divisionResult;
  80. 	printf("Enter the Divided Number: ");
  81. 	scanf("%f", &divisionResult);
  82. 	printf("How many numbers do you want to divide?: ");
  83. 	scanf("%d", &numberOfLoop);
  84. 	for(int start = 1; start<=numberOfLoop; start++){
  85. 		printf("Enter number %d", start);
  86. 		scanf("%f", &enteredNumber);
  87. 		if (enteredNumber==0){
  88. 			printf("Error: You cannot divide number by zero! Try Again!");
  89. 			break;
  90. 		}
  91. 		divisionResult /= enteredNumber;
  92. 	}
  93. 	printf("The result is %f", divisionResult);
  94. }
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https://ideone.com/2JvHx
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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