選択できるのは25トピックまでです。
トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。
150 行
3.9 KiB
150 行
3.9 KiB
#!./main
|
|
|
|
#include <math.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <assert.h>
|
|
|
|
int x = 21;
|
|
|
|
int baz(int xx, ...) { return 42; }
|
|
|
|
int foo(void) { return x + x; }
|
|
|
|
char *bar(void) { return "bye bye"; }
|
|
|
|
struct Point { float x, y; };
|
|
|
|
struct Point pt;
|
|
|
|
float Point_magnitude(struct Point p) { return sqrtf(p.x * p.x + p.y * p.y); }
|
|
|
|
int gbl[5];
|
|
|
|
int gg[] = { -2, ~2, !2, 6+7, 6*7 };
|
|
|
|
struct G1 { int x, y; };
|
|
typedef struct G2 { int x, y; } G2_t;
|
|
typedef struct { int x, y; } G3_t;
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
printf("hello, world %d %s\n", foo(), bar());
|
|
printf("baz is %d %d %d\n", baz(1), baz(1, 2), baz(1, "two", 3));
|
|
printf("%d\n", 6*7);
|
|
int x = 42;
|
|
int *p = &x;
|
|
printf("x is %d p is %p\n", *p, p);
|
|
*p = 666;
|
|
printf("x is %d %d\n", x, *p);
|
|
x = 123;
|
|
printf("x is %d %d\n", x, *p);
|
|
for (x = 0; x < 10; ++x) {
|
|
if (x == 5) printf("%%");
|
|
printf("%d ", x);
|
|
}
|
|
printf("\n");
|
|
while (x > 0) printf("%d ", --x);
|
|
printf("\n");
|
|
printf("%d\n", sizeof(char *));
|
|
|
|
int i, array[5] = { 2, 3, 5, 7, 11 };
|
|
printf("array size %d\n", sizeof(array));
|
|
for (i = 0; i < 5; ++i) printf("%d\n", array[i]);
|
|
for (i = 0; i < 5; ++i) array[i] = i*i;
|
|
for (i = 0; i < 5; ++i) printf("%d\n", array[i]);
|
|
|
|
for (i = 0; i < 5; ++i) array[i] = array[i] * array[i];
|
|
for (i = 0; i < 5; ++i) printf("%d\n", array[i]);
|
|
|
|
printf("%p\n", array);
|
|
printf("%p\n", array + 10);
|
|
p = array;
|
|
printf("%p\n", p);
|
|
printf("%p\n", array+5);
|
|
|
|
while (p < array+5) printf("%d\n", *p++);
|
|
|
|
printf("%p\n", array);
|
|
printf("%p\n", &array);
|
|
printf("%p\n", &array[0]);
|
|
|
|
assert(array == &array);
|
|
assert(array == &array[0]);
|
|
assert(&array == array);
|
|
assert(&array[0] == array);
|
|
|
|
char *sliteral = "string literal";
|
|
char sarray[] = "string array";
|
|
char tarray[13] = "string array";
|
|
char uarray[20] = "string array";
|
|
char varray[12] = "string array";
|
|
|
|
printf("%zd %s\n", sizeof(sliteral), sliteral);
|
|
printf("%zd %s\n", sizeof(sarray), sarray);
|
|
printf("%zd %s\n", sizeof(tarray), tarray);
|
|
printf("%zd %s\n", sizeof(uarray), uarray);
|
|
printf("%zd %s\n", sizeof(varray), uarray); // varray has unterminated string
|
|
|
|
printf("gbl %f %f -> %f\n", pt.x, pt.y, Point_magnitude(pt)); // global data is filled with zero
|
|
pt.x = 3.0;
|
|
pt.y = 4.0;
|
|
printf("gbl %f %f -> %f\n", pt.x, pt.y, Point_magnitude(pt));
|
|
|
|
struct Point qt;
|
|
printf("lcl %f %f -> %f\n", qt.x, qt.y, Point_magnitude(qt)); // local data is random
|
|
qt.x = 3.0;
|
|
qt.y = 4.0;
|
|
printf("lcl %f %f -> %f\n", qt.x, qt.y, Point_magnitude(qt));
|
|
|
|
struct Point rt = { 5.0, 12.0 };
|
|
printf("%f %f -> %f\n", rt.x, rt.y, Point_magnitude(rt));
|
|
|
|
for (i = 0; i < 5; ++i) printf("g %d\n", gbl[i]); // global data is filled with zero
|
|
int lcl[5];
|
|
for (i = 0; i < 5; ++i) printf("l %d\n", lcl[i]); // local data is random
|
|
|
|
int ll[] = { -2, ~2, !2, 6+7, 6*7 };
|
|
|
|
for (i = 0; i < sizeof gg / sizeof(int); ++i) printf("g %d ", gg[i]); printf("\n");
|
|
for (i = 0; i < sizeof ll / sizeof(int); ++i) printf("l %d ", ll[i]); printf("\n");
|
|
|
|
struct S { int a, b; };
|
|
|
|
typedef struct S SS;
|
|
|
|
SS s;
|
|
|
|
s.a = 42;
|
|
s.b = 666;
|
|
printf("%d %d\n", s.a, s.b);
|
|
|
|
struct L1 { int x, y; };
|
|
typedef struct L2 { int x, y; } L2_t;
|
|
typedef struct { int x, y; } L3_t;
|
|
|
|
struct G1 g1 = { 10, 11 };
|
|
G2_t g2 = { 12, 13 };
|
|
G3_t g3 = { 14, 15 };
|
|
|
|
struct L1 l1 = { 20, 21 };
|
|
L2_t l2 = { 22, 23 };
|
|
L3_t l3 = { 24, 25 };
|
|
|
|
printf("%d %d %d %d %d %d %d %d %d %d %d %d\n", g1.x, g1.y, g2.x, g2.y, g3.x, g3.y, l1.x, l1.y, l2.x, l2.y, l3.x, l3.y);
|
|
|
|
typedef L2_t L2_t_t;
|
|
|
|
L2_t_t ll2 = { 42, 666 };
|
|
|
|
printf("%d %d\n", ll2.x, ll2.y);
|
|
|
|
printf("passed\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Local Variables:
|
|
// mode: c
|
|
// End:
|