问这份C结构赋值声明合法吗？

EN

#include <stdio.h>
#include <string.h>

struct st {

    char stringField[100];
    int intField;
};

typedef struct st st;

void test(st *parameterStruct)
{
    st localStruct;
    strcpy(localStruct.stringField, "HELLO");
    localStruct.intField = 5;

    *parameterStruct = localStruct;
}

int main()
{
    st myStruct;
    strcpy( myStruct.stringField, "XXX" );
    myStruct.intField = 9;

    printf("%s,%i\n", myStruct.stringField, myStruct.intField );

    test(&myStruct);

    printf("%s,%i\n", myStruct.stringField, myStruct.intField);

    return 0;
}

XXX,9
HELLO,5