This code reads three integers, calculates their sum, and tries to print the sum. However, it has a syntax error and a logical issue in the printf line.

- The line `printf("%d+%d+%d=%d ", a + b + c = d)` is incorrect. In C, you cannot assign a value inside a printf argument like that. The expression `a + b + c = d` tries to assign `d` to the result of `a + b + c`, which is not allowed because `a + b + c` is not a variable.

- You are missing a semicolon at the end of the printf line. Every statement in C must end with a semicolon.