Initialize an array of an array of structs

Question

I am trying to initialize an array of an array of structs in C. Is this possible?

Example to illustrate the issue (does not compile):

typedef struct myStruct
{
    int row;
    int cols;
} myStruct;

myStruct dataSets[][] =
{
    myStruct dataSet1[]
    {
        {0,1},
        {0,2},
        {0,3},
    },

    myStruct dataSet2[]
    {
        {1,1},
        {1,2},
        {1,3},
    }
};

your myStruct definition is entirely different than what you are initializing in it's instance. — Tauqeer Akhtar
– Tauqeer Akhtar, Commented Dec 8, 2021 at 14:30

dbush · Accepted Answer · 2021-12-08 13:49:27Z

6

When initializing a multidimensional array, only the outer array dimension may be omitted. You also don't need to specify the type for nested initializers as the type is implied from context:

myStruct dataSets[][3] =
{
    {
        {0,1},
        {0,2},
        {0,3},
    },
    {
        {1,1},
        {1,2},
        {1,3},
    }
};

answered Dec 8, 2021 at 13:49

dbush

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