The div, ldiv, and lldiv, functions compute quotient (numer / denom ) and remainder (numer % denom ) in a single operation.

These functions div, ldiv, and lldiv, are defined in stdlib.h header file and returns a structure that comprises the quotient and the remainder. So let see these function one by one with some example code.

Note: If either the remainder or the quotient cannot be represented, the behavior is undefined.

div():

The div function takes an int as an argument and computes quotient and remainder in a single operation. The first parameter passed in a div() function is taken as the numerator and the 2nd parameter is taken as the denominator. Let’s see the syntax of the div function.

//Syntax of div function

div_t div(int numer, int denom);

Parameters:

numer— The numerator.

denom— The denominator.

Return:

The div function returns a structure of type div_t, comprising both the quotient and the remainder. The div_t structure looks like this:

typedef struct
{
    int quot;  /* Quotient.  */
    int rem;   /* Remainder.  */
} div_t;

Let’s see an example code to understand the functionality of the div in C. This C code, calculate the quotient and remainder of two given numbers by calling div functions. Finally, it prints the structure members quot and rem.

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

int main()
{
    div_t div_result;

    div_result = div(25,6);

    printf("Quotient = %d\n", div_result.quot);

    printf("Remainder = %d\n", div_result.rem);

    return 0;
}

When you run the program, the output will be:

ldiv():

The ldiv function takes an long int as an argument and computes quotient and remainder in a single operation. The first parameter passed in a ldiv() function is taken as the numerator and the 2nd parameter is taken as the denominator. Let’s see the syntax of the ldiv function.

//Syntax of ldiv function

ldiv_t ldiv(long int numer, long int denom);

Parameters:

numer— The numerator.

denom— The denominator.

Return:

The ldiv function returns a structure of type ldiv_t, comprising both the quotient and the remainder. The ldiv_t structure looks like this:

typedef struct
{
    long int quot;  /* Quotient.  */
    long int rem;   /* Remainder.  */
} ldiv_t;

Let’s see an example code to understand the functionality of the ldiv in C. This C code, calculate the quotient and remainder of two given numbers by calling ldiv functions. Finally, it prints the structure members quot and rem.

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

int main()
{
    ldiv_t ldiv_result;

    ldiv_result = ldiv(17267012L,60L);

    printf("Quotient = %ld\n", ldiv_result.quot);

    printf("Remainder = %ld\n", ldiv_result.rem);

    return 0;
}

When you run the program, the output will be:

Quotient = 287783

Remainder = 32

Note: for long int, you should use %ld format specifier with printf. If you are new in C programming you can read the article “Format specifiers in C“.

lldiv():

The lldiv function takes an long long int as an argument and computes quotient and remainder in a single operation. The first parameter passed in a lldiv() function is taken as the numerator and the 2nd parameter is taken as the denominator. Let’s see the syntax of the lldiv function.

//Syntax of lldiv function


lldiv_t lldiv(long long int numer, long long int denom);

Parameters:

numer— The numerator.

denom— The denominator.

Return:

The lldiv function returns a structure of type lldiv_t, comprising both the quotient and the remainder. The lldiv_t structure looks like this:

typedef struct
{
    long long int quot;  /* Quotient.  */
    long long int rem;   /* Remainder.  */
} lldiv_t;

Let’s see an example code to understand the functionality of the lldiv in C. This C code, calculate the quotient and remainder of two given numbers by calling lldiv functions. Finally, it prints the structure members quot and rem.

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

int main()
{
    lldiv_t lldiv_result;

    lldiv_result = lldiv(172670128L,90L);

    printf("Quotient = %lld\n", lldiv_result.quot);

    printf("Remainder = %lld\n", lldiv_result.rem);

    return 0;
}

Quotient = 1918556

Remainder = 88

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