# tutorial6 - To scan values using a function, we have to set...

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To scan values using a function, we have to set the input type as pointer type [void readFrac (struct Frac *f)], and the input to call the function is the address of the variable [readFrac(&f)] and the address of each part of the structure is address of what the pointer is pointing to, [scanf(“%d/%d”, &((*f).num), &((*f).den)]. &((*f).num) is BUT &(f.num) = &((*f).num) = f.num in this case, because both input for the main function and readFrac functions have the same name. the &(f.num) is from the main function and the f.num is the readFrac function.

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Function swap: input type is pointer type [void swap (int *, int *)] 11 , input to call the function is address 51 Function reduce: input type is pointer type [void reduce (struct Frac *)] 13 , input to call the function is address 20 . In the function, everything is input into the address of the variable itself, since return void 63 -> everything input using pointers [int gcd1 = gcd (((*f).num), ((*f).den)); (*f).num /= gcd1; (*f).den /= gcd1;] 65
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## This note was uploaded on 01/09/2012 for the course ELECTRICAL 1221 taught by Professor Tan during the Spring '11 term at National University of Singapore.

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tutorial6 - To scan values using a function, we have to set...

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