The problem is to determine the output of the given C code. The code initializes integer variables $a, b, c,$ and $d$, performs several assignment operations, and then prints the values of the variables using the $printf$ function. We need to trace the values of the variables through the operations and determine the final output.

1. Problem Description

The problem is to determine the output of the given C code. The code initializes integer variables $a, b, c,$ and $d$, performs several assignment operations, and then prints the values of the variables using the $printf$ function. We need to trace the values of the variables through the operations and determine the final output.

2. Solution Steps

First, we initialize the variables:

$a = 2$

$b = 5$

$c = 6$

$d = 10$

Next, we perform the following assignment operations:

1. $a += b$ which is equivalent to $a = a + b$. So, $a = 2 + 5 = 7$.

2. $b -= c$ which is equivalent to $b = b - c$. So, $b = 5 - 6 = -1$.

3. $c *= d$ which is equivalent to $c = c * d$. So, $c = 6 * 10 = 60$.

4. $d /= a$ which is equivalent to $d = d / a$. So, $d = 10 / 7 = 1$ (integer division).

5. $a \%= c$ which is equivalent to $a = a \% c$. So, $a = 7 \% 60 = 7$.

Finally, the $printf$ statement prints the values of $a, b, c, d,$ and $a$.

printf("%d%d%d%d%d",a,b,c,d,a);

Therefore, the output will be the values of the variables in the specified order.

3. Final Answer

7,-1,60,1,7