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C Exercises: Reverse digits of a given a 32-bit signed integer

C Programming Practice: Exercise-5 with Solution

Write a C programming to reverse digits of a given a 32-bit signed integer.

C Code:

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>

static int reverse(int x)
{
    int y = 0;
    while (x != 0) {
        int n = x % 10;
        if (y > INT_MAX / 10 || y < INT_MIN / 10) {
            return 0;
        }
        y = y * 10 + n;
        x /= 10;
    }
    return y;
}
int main(void)
{
    int x = 123;
    printf("Original integer: %12d",x);
    printf("\nReverse integer : %12d",reverse(x));
    return 0;
}

Sample Output:

Original integer:          123
Reverse integer :          321

Pictorial Presentation:

C Programming: Reverse digits of a given a 32-bit signed integer.

Flowchart:

C Programming Flowchart: Reverse digits of a given a 32-bit signed integer

C Programming Code Editor:

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Next: Write a C program to convert a given integer to roman number.

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C Programming: Tips of the Day

The tilde operator in C:

The ~ operator is bitwise NOT, it inverts the bits in a binary number:

NOT 011100
  = 100011

Ref : https://bit.ly/3DR1N24