'Inserting spaces between digits in C

How would I go about taking a number like 123456 and having it print as 1 2 3 4 5 6?

Solution 1:^[1]

The simplest way of doing this (though not the fastest) would probably be to first sprintf the number to a string buffer, and then loop through the buffer printf-ing one character and one space at a time.

There's no built-in way of doing this within the standard printf formatting.

Solution 2:^[2]

A common method would be to extract each digit, and then print that digit. I won't give you the code, but it's the implemented version of:

int d; // your number

/* While `d` is not zero */
/* Modulus `d` with 10 to extract the last digit */
/* Print it, with your space */
/* Divide by 10 to remove the last digit */
/* Repeat */

This will be backwards. I'll leave it as an exercise to you to fix that. (Hint: In the loop, put the result into an array of characters, and when you're finished start at the last index of the array and print backwards.)

Solution 3:^[3]


char buffer[50];
int myNum = 123456;
int n;
int i;

n = snprintf(buffer, sizeof buffer, "%d", myNum);

for (i = 0; i < n; i++)
{
    putchar(buffer[i]);
    putchar(' ');
}

putchar('\n');

Solution 4:^[4]

int number = 123456;
char strNumber[64];
strNumber[0] = '\0';
sprintf_s(strNumber, "%d", number);
int i = 0;
while(strNumber[i] != '\0')
    printf("%c ", strNumber[i++]);

Solution 5:^[5]

This only works for unsigned integers:

#include <stdio.h>
#include <math.h>

void print_number(unsigned int number) {
    int n = number, c = 0, p;
    while (n > 0) {
        n /= 10;
        c++;
    }
    for (n = c - 1; n >= 0; n--) {
        p = pow(10, n);
        printf("%d ", number / p);
        number -= number / p * p;
    }
    printf("\n");
}


int main(int argc, char *argv[]) {
    print_number(1);
    print_number(12);
    print_number(123);
    print_number(1234);
    print_number(12345);
    print_number(1234567);
    print_number(12345678);
    print_number(123456789);
    return 0;
}

Solution 6:^[6]

#include <stdio.h>
int main ()
{
    int a, b, c, d, e;
    printf("Write a number of four figures\n");
    scanf("%d", &a);
    printf("Your number is:\n");

    b = (a - (a % 1000)) / 1000;
    c = ((a - (a % 100)) / 100) - b * 10;
    d = ((a - (a % 10)) / 10) - b * 100 - c * 10;
    e = (a - b * 1000 - c * 100 - d * 10);

    printf("%d\t%d\t", b, c);
    printf("%d\t", d);
    printf("%d", e);

    return 0;
}

Solution 7:^[7]

#include <stdio.h>
#include <conio.h>

int main ()
{

    int n, a, b, c, d, e;
    printf("Enter integer number from 0 to 32, 767: ");
    scanf("%d", &n);
    printf("\n");
    a= n/10000%10;
    b= n/1000%10;
    c= n/100%10;
    d= n/10%10;
    e= n%10;
    printf("%d %d %d %d %d\n", a, b, c, d, e);

RESULTS/OUPUT:

Enter integer number from 0 to 32,767: 12345

1 2 3 4 5

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1
Solution 2
Solution 3	dreamlax
Solution 4	ratnaveer
Solution 5	Leonardo Herrera
Solution 6	bunbun
Solution 7	Suraj Rao

'Inserting spaces between digits in C

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]

Solution 7:[7]