Read three floating-point measurements and print their average, rounded to exactly 2 decimal places, in the form:
Average: 2.00Two things to watch for. First, scanf and printf use different format specifiers for the same type: reading a
double needs %lf, but printing one uses %f (the l is only meaningful to scanf, which needs to know how
many bytes to write into). Second, divide by 3.0, not 3 – dividing by the integer literal 3 still produces a
correct result here because at least one operand (a + b + c) is already a double, so the whole expression
promotes to floating-point before the division happens. It’s worth being deliberate about it anyway.