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Initializing multiple of the same structs with the same values in C

I made a struct with a few members and want to create multiple structure variables with the same initial member values.

My struct is the following:

    struct tempSens {
      float temperature;
      volatile int updateTimer;
    };

I want to make 2 structure variables TS1 and TS2 that both initialize their members with .temperature = 40.0 and .updateTimer = 10

I thought I could do it as shown below, but this way TS1 is initialized with both members set to 0 and TS2 with the given values 40.0 and 10 respectively.


    tempSens TS1, TS2 = {40.0, 10};

I am looking for a more efficient way than doing:

    tempSens TS1 = {40.0, 10};
    tempSens TS2 = {40.0, 10};

Is there any way to achieve this without having to give the member values to each structure variable?

Solution

  • Inside a function, you can use tempSens TS1 = {40.0, 10}, TS2 = TS1;.

    Inside or outside a function, you can use:

    #define TSInitializer {40.0, 10}

tempSens TS1 = TSInitializer, TS2 = TSInitializer;

    If you use GCC or Clang and use an array, you can use GCC’s range extension for designated initializers:

    struct tempSens Array[100] = { [0 ... 99] = {40.0, 10} };