warning: format ‘%d’ expects type ‘int *’, but argument 2 has type ‘int’

Question

So I\'m new to C and am having trouble with whats happening with this warning. What does the warning mean and how can i fix it. The code i wrote is here:

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Answer 1

You should write scanf("%d", &age), as the scanf function needs to modify the value of age, hence the need to pass it "by address" and not "by value".