Python 到 C for 循环转换

Question

我有以下 python 代码:

r = range(1,10)
r_squared = []

for item in r:
    print item
    r_squared.append(item*item)

如何将此代码转换为 C 语言？ C 中有类似可变数组的东西吗？或者我该如何做相当于 python 追加的事情？

Answer 1

c 中的简单数组。C 中的数组是同质

int arr[10];
int i = 0;
for(i=0;i<sizeof(arr);i++) 
{ 
  arr[i] = i; // Initializing each element seperately 
}

尝试在 C 中使用 vector 来完成这个 link

/ vector-usage.c

#include <stdio.h>
#include "vector.h"

int main() {
  // declare and initialize a new vector
  Vector vector;
  vector_init(&vector);

  // fill it up with 150 arbitrary values
  // this should expand capacity up to 200
  int i;
  for (i = 200; i > -50; i--) {
    vector_append(&vector, i);
  }

  // set a value at an arbitrary index
  // this will expand and zero-fill the vector to fit
  vector_set(&vector, 4452, 21312984);

  // print out an arbitrary value in the vector
  printf("Heres the value at 27: %d\n", vector_get(&vector, 27));

  // we're all done playing with our vector, 
  // so free its underlying data array
  vector_free(&vector);
}