Study of all arithmetic operations on integers.
  #include <stdio.h>

int main(void)
{
/* variable declaration statements */
int n1, n2, res;

/* Assign values to variables n1 and n2 */
n1 = 82;
n2 = 19;

/* Perform various arithmetic operations */
res = n1 + n2;
printf("\n %d + %d = %d", n1, n2, res);

res = n1 - n2;
printf("\n %d - %d = %d", n1, n2, res);

res = n1 * n2;
printf("\n %d * %d = %d", n1, n2, res);

res = n1 / n2;
printf("\n %d / %d = %d", n1, n2, res);

res = n1 % n2;
printf("\n %d %% %d = %d", n1, n2, res);

/* Homework :
Add code for +=, -=, *=, /=, %=, ++, -- */

return 0;
}