代码如下：
#include <stdio.h>
#include <stdlib.h>
#define ERROR 0
#define OK 1
typedef struct Vector {
int size, length;
int *data;
} Vector;
void init(Vector *vector, int size) {
vector->size = size;
vector->length = 0;
vector->data = (int *)malloc(sizeof(int) * size);
}
void expand(Vector *vector) {
int *old_data=vector->data;
vector->size=vector->size*2;
vector->data=(int*)malloc(sizeof(int)*vector->size);
for(int i=0;i < vector->length;i++){
vector->data[i]=old_data[i];
}
free(old_data);
printf("expand
");
}
int insert(Vector *vector, int loc, int value) {
if (loc < 0 || loc > vector->length) {
printf("failed
");
return ERROR;
}
if (vector->length >= vector->size) {
//return ERROR;
expand(vector);
}
for (int i = vector->length; i > loc; --i) {
vector->data[i] = vector->data[i - 1];
}
vector->data[loc] = value;
vector->length++;
printf("success
");
return OK;
}
void clear(Vector *vector) {
free(vector->data);
free(vector);
}
int main() {
Vector *a = (Vector *)malloc(sizeof(Vector));
init(a, 5);
int n;
scanf("%d",&n);
while(n>0){
int p,q;
scanf("%d %d",&p,&q);
insert(a,p,q);
n--;
}
clear(a);
return 0;
}