# C Exercises: Find the difference between the largest integer and the smallest integer created by 8 numbers from 0 to 9

## C Basic Declarations and Expressions: Exercise-143 with Solution

Write a C program to find the difference between the largest integer and the smallest integer, which are created by 8 numbers from 0 to 9. The number that can be rearranged shall start with 0 as in 00135668.

Input:

Data is a sequence of 8 numbers (digits from 0 to 9).

Output:

The difference between the largest integer and the smallest integer.

**Sample Solution:**

**C Code:**

```
#include<stdio.h>
int main() {
int max_val, min_val, k, d, t;
// Prompt user to input an integer created by 8 numbers (0 to 9)
printf("Input an integer created by 8 numbers (0 to 9):\n");
scanf("%d", &d);
int i, j, s[8] = {0};
// Extract individual digits and store them in array s
for (i = 0; d != 0; i++) {
s[i] = d % 10;
d /= 10;
}
// Sort the digits in descending order
for (i = 0; i < 8; i++) {
for (j = 1; j + i < 8; j++) {
if (s[j - 1] < s[j]) {
t = s[j - 1];
s[j - 1] = s[j];
s[j] = t;
}
}
}
max_val = 0;
// Construct the largest integer from sorted digits
for (i = 0; i < 8; i++) {
max_val *= 10;
max_val += s[i];
}
// Reverse the order of digits in array s
for (i = 0; i * 2 < 8; i++) {
t = s[i];
s[i] = s[7 - i];
s[7 - i] = t;
}
min_val = 0;
// Construct the smallest integer from reversed digits
for (i = 0; i < 8; i++) {
min_val *= 10;
min_val += s[i];
}
// Calculate and display the difference between the largest and smallest integers
printf("\nThe difference between the largest integer and the smallest integer.\n");
printf("%d - %d = %d\n", max_val, min_val, max_val - min_val);
return 0;
}
```

Sample Output:

Input an integer created by 8 numbers (0 to 9): 25346879 The difference between the largest integer and the smallest integer. 98765432 - 23456789 = 75308643

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