18.Return value without return keyword

 #include <stdio.h>

 void sumAndavg(int x, int y,int *sum,float *avg)

{

   *sum=x+y;

   *avg=(float)(x+y)/2;

}

int main()

{

    int a, b,sum;

    float avg;

    printf("Enter two natural numbers :");

    scanf("%d %d", &a, &b);

    sumAndavg(a,b,&sum,&avg);

    printf("\nThe sum is %d and average is %0.2f",sum,avg);//2 zeros after decimal

   

    return 0;

}