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⇱ C言語の小ネタ集 #C - Qiita


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C言語の小ネタ集

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Last updated at Posted at 2017-04-08

URL直書き

direct_url.c
void complex_algorithm()
{
 https://en.wikipedia.org/wiki/Complex_Algorithm
 /*
 * 複雑なアルゴリズムのコード
 */
}

--> 演算子(1)

goto_operator1.c
#include <stdio.h>
int main()
{
 int n = 5;
 do {
 printf("%d ", n);
 } while (n --> 1);
 printf("done!\n");
}
実行結果
5 4 3 2 1 done!

--> 演算子(2)

goto_operator2.c
#include <stdio.h>
int main()
{
 int n = 10;
 while (n --\
 \
 \
 \
 > 1)
 printf("%d ", n);
}
実行結果
9 8 7 6 5 4 3 2 1 

??!??! 演算子

magic_operator.c
#include <stdio.h>
int magic_operator(int a, int b)
{
 return a ??!??! b;
}

int main()
{
 int r = magic_operator(42, 0);
 printf("result = %d\n", r);
}
実行結果
result = 1

-=- 演算子

balance_operator.c
#include <stdio.h>
int main()
{
 int i;
 for (i = 0; i < 10; i -=- 1) {
 printf("%d ", i);
 }
}
実行結果
0 1 2 3 4 5 6 7 8 9 

べき乗演算子

pow_operator.c
#include <stdio.h>
int main()
{
 printf("%d", 50 ** "2");
}
実行結果
2500
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