code in C please

Write the definition of a function square, which receives an integer parameter and returns the square the value of the parameter. So if the parameter's value is 7, the function returns the value 49. If the parameter's value happens to be 25, the functions returns the value 625. If the value of the parameter is 0, the function returns 0.

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add is a function that accepts two int parameters and returns their sum.

Two int variables, euroSales and asiaSales, have already been declared and initialized. Another int variable, eurasiaSales, has already been declared.

Write a statement that calls add to compute the sum of euroSales and asiaSales and store this value in eurasiaSales.

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