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Functions that returns a struct

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• Functions that return a struct
  • Example:

    #include <stdio.h> /* --------------------------------- Define the BankAccount data type --------------------------------- */ struct BankAccount { int accNum; double balance; }; /* ---------------------------------------------------- Function that returns a BankAccount struct (object) ---------------------------------------------------- */ struct BankAccount f( ) { struct BankAccount p; p.accNum = 4; p.balance = 4444.0; return p; // Return a BankAccount "object" (struct) } int main(int argc, char *argv[]) { struct BankAccount a; a = f ( ); // How to call f( ) printf("AFTER calling update: a.accNum = %d a.balance = %f\n", a.accNum, a.balance); }

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  • How to use a function that returns a struct type:

    struct BankAccount a; a = f ( ); // Assign the returned structure to a struct variable

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  • Example Program: (Demo above code)                                                
    • Prog file: /home/cs255001/demo/C/set2/struct-return1.c

    How to run the program:

    To compile:   gcc struct-return1.c        To run:          a.out