69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <time.h>
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struct IntArrayStr{
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int *data;
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size_t length;
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size_t capacity;
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};
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void read_int_array_str(struct IntArrayStr *in_str) {
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for (size_t i = 0; i < in_str->length; i++) {
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printf("digit:%zu = %d\n", i, in_str->data[i]);
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}
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}
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struct IntArrayStr *create_int_array_str(size_t in_capacity) {
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struct IntArrayStr *mystr = malloc(sizeof(struct IntArrayStr)); //allocate memory for struct
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mystr->data = malloc(sizeof(int) * in_capacity); //make sure the pointer in the struct points to the array
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mystr->length = 0; //forgot to actually assign a value to the struct
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mystr->capacity = in_capacity;
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if (mystr->data == NULL) {
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exit(0);
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}
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return mystr;
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}
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/* push value to struct, also handle realloc */
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void push_int_array_str(int in_int, struct IntArrayStr *in_str){
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if (in_str->length == in_str->capacity) { //check if already full
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in_str->capacity*=2; //if so we should double
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printf("intarray capacity is now:%zu\n", in_str->capacity);
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int *temp; //create a temporary pointer
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temp = realloc(in_str->data, sizeof(int)*in_str->capacity); //realloc the data into a new bucket
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if(temp == NULL){exit(0);}; //check if actually valid
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in_str->data = temp; //if valid, make sure the pointer in the struct points to the realloced block
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}
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in_str->data[in_str->length] = in_int;
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printf("number:%zu = %d\n", in_str->length, in_str->data[in_str->length]);
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in_str->length++; //didn't read the flow when transferring and accidentally put this in the if block
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printf("intarray length is now:%zu\n", in_str->length);
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//also had an off-by-one error because I increased length before doing anything
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}
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int main() {
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srand(time(NULL));
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printf("input numbers:\n");
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struct IntArrayStr *myintarraystr = create_int_array_str(2);
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int input;
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size_t length = 10;
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while (input != -1) {
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scanf("%d", &input);
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push_int_array_str(input, myintarraystr);
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}
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read_int_array_str(myintarraystr);
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free(myintarraystr->data);
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free(myintarraystr);
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return 0;
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}
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