array_st.h

来自「palm的pocketc」· C头文件 代码 · 共 42 行

/$ array_st
// array_st(int dim, string stype)
// create an array of structures described by stype
// (as described by malloct())
// see example at bottom

array_st(int dim, string stype) {
	pointer base_array, index_array;
	int i, slen;

	slen = strlen(stype);
	base_array = malloct(dim, stype);
	if (!base_array)
		return 0;
	index_array = malloct(dim, "p");
	if (!index_array) {
		free(base_array);
		return 0;
	}
	for (;i<dim;i++)
		index_array[i] = &base_array[slen * i];
	return index_array;
}

/*
Example: create an array of structures, where each
  structure contains a string name, and an int age
  
#define H_NAME 0
#define H_AGE 1

main() {
  pointer humans;
  humans = array_st(5, "si");
  
  humans[0][H_NAME] = "Alex";
  humans[0][H_AGE] = 5;
  humans[1][H_NAME] = "Billy";
  humans[1][H_AGE] = 6;
  ...
}
*/