Return multiple values in C

Method 1 : Using Array

• If more than two variables of same type is to be returned then we can use array .
• Store each and every value to be returned in an array and return base address of that array.

Method 2 : Using Pointer and One Return Statement

• Pointer Variable can updated directly using  Value at ['*'] Operator.
• Usually Function can return single value.
• If we need to return more than two variables then update 1 variable directly using pointer and return second variable using ‘return Statement‘. [ Call by Value + Call by Reference ]

EX:

#include

int* function2(int a){

    int* array = (int*)malloc(2);

    int b=(65*a)/100;

    int c=5*8;

    array[0]=b;

    array[1]=c;

    return array;

}

int main(void)

{

    int a=18,i;

    int* array;

    array=function2(a);

   for(i=0;i<2 div="" i="">

   {

        printf("array[%d]: %d\n",i,array[i]);

    }

    free(array);

    

     getch();  

}

Method 3 : Using Structure 

• Construct a Structure containing values to be returned and then return the base address of the structure to the calling function.

EX:

#include

struct dont { int x; double y; };

struct dont fred(void)
{
        struct dont b;
        b.x = 1;
        b.y = 91.99919;
        return b;
}

int main(int argc, char **argv)
{
        struct dont look = fred();
        printf("look.x = %d, look.y = %lf\n", look.x, look.y);
        getch();
        return 0;
}