C Program to Input 3 Arguments and Operate Appropriately on the Numbers

This is a C Program to input 3 arguments and operate appropriately on the numbers.

Problem Description

This program take 3 arguments as input and operate appropriately on the numbers.

Problem Solution

1. Take two numbers and a operator as 3 arguments.
2. Use switch statement to test the operator.
3. According to the operator, do the operation and exit.

Program/Source Code

Here is source code of the C Program to input 3 arguments and operate appropriately on the numbers. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

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/* 
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 * C Program to Input 3 Arguments and Operate Appropriately on the

```
 * Numbers
```
```
 */
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```
#include <stdio.h>
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```
 
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void main(int argc, char * argv[])
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{
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    int a, b, result;
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    char ch;
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```
 
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    printf("arguments entered: \n");
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    a = atoi(argv[1]);
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    b = atoi(argv[2]);
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    ch  = *argv[3];
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    printf("%d %d %c", a, b, ch);
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    switch (ch)
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    {
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    case '+':
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        result = a + b;
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        break;
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    case '-':
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        result = a - b;
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        break;
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    case 'x':
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        result = a * b;
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        break;
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    case '/':
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        result = a / b;
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        break;
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    default:
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        printf("Enter a valid choice");
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    }
```

    printf("\nThe result of the operation is %d", result);

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    printf("\n");    
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}
```

Program Explanation

1. Take two numbers and a operator as input and store it in the variables a, b and ch respectively.
2. Using switch statement, test the operator stored in the variable ch.
3. If it is +, then add a & b and break.
4. If it is -, then subtract a & b and break.
5. If it is *, then multiply a & b and break.
6. If it is /, then divide a & b and break.
7. In the default case print it as “Enter a valid choice”.
8. Store the solution got at steps 3-6 in the variable result.
9. Print the variable result as output and exit.

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Runtime Test Cases

arguments entered:
5 4 +
The result of the operation is 9
 
arguments entered:
8 7 -
The result of the operation is 1
 
arguments entered:
9 6 x
The result of the operation is 54
 
arguments entered:
100 10 /
The result of the operation is 10

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