An example of a C program

example_of_c.c

/* -*- mode: C -*- */
#include <stdlib.h>
#include <stdio.h>

/* プログラムの本体 */
int main(void) {
  // 宣言
  double A[5] = {
    [0] = 9.0,
    [1] = 2.9,
    [4] = 3.E+25,
    [3] = .00007,
  };

  // 処理をする
  for (size_t i = 0; i < 5; ++i) {
    printf("element %zu is %g, \tits square is %g\n",
           i,
           A[i],
           A[i]*A[i]);
  }

  return EXIT_SUCCESS;
}