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Returning struct in function

This is a discussion on Returning struct in function within the C Programming forums, part of the General Programming Boards category; Hi, while I was reading the struct tutorial over cprogramming.com, I found this You can also return structures from functions ...

  1. #1
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    Jun 2012
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    Question Returning struct in function

    Hi, while I was reading the struct tutorial over cprogramming.com, I found this

    You can also return structures from functions by defining their return type as a structure type. For instance:

    struct database fn();


    "Return structures from functions by defining their return type as a structure type"

    I tested it by writing a simple program. I am wondering what should I type after return. I tested each of the followings. But doesn't seem to work. Mind to give some help?

    Code:
    return data;
    return struct data;
    return data.value;
    My code
    Code:
     
    Code:
    #include <stdio.h>
    
    
    struct data get_value(void);
    
    
    struct data
    {
    	int value;
    	float sales;
    };
    
    
    
    
    int main(void)
    {
    
    
    	getchar();
    	return 0;
    }
    
    
    struct data get_value(void)
    {
    	printf("Enter value : ");
    	scanf("%d", &data.value);
    
    
    	printf("\nEnter sales : ");
    	scanf("%f", &data.sales);
    
    
    	return data.value;  // <--- This one
    }

  2. #2
    C++ Witch laserlight's Avatar
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    You did not create an object of type struct data, so there was nothing to store into. Contrast with:
    Code:
    #include <stdio.h>
    
    struct data get_value(void);
    
    struct data
    {
        int value;
        float sales;
    };
    
    int main(void)
    {
        struct data data_object = get_value();
        getchar();
        return 0;
    }
    
    struct data get_value(void)
    {
        struct data data_object;
    
        printf("Enter value : ");
        scanf("%d", &data_object.value);
    
        printf("\nEnter sales : ");
        scanf("%f", &data_object.sales);
    
        return data_object;
    }
    xeon321 and zaksd like this.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
    Registered User
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    Oh! Now I see. Thanks

  4. #4
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    I was wondering if I can explain the line
    Code:
    structdata data_object = get_value();
    Like this,
    *By using the terms data type, variable name and value*

    Data type Variable name Value
    __________ __________ __________
    |struct data| |data_object| |get_value();|
    ========= ========= ==========


    Last edited by xeon321; 06-24-2012 at 01:56 AM.

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