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/* Passing structs by value */
#include <stdio.h>
struct S { int x; double d; char c; };
struct S f(struct S s, int scale)
{
struct S r;
r.x = s.x + scale;
r.d = s.d * scale;
r.c = 'f';
return r;
}
struct T { char a, b; };
struct T g(struct T s)
{
struct T r;
r.a = s.b;
r.b = s.a;
return r;
}
int main()
{
struct S a = { 123, 2.718, 'a' };
struct S b, c, d, e;
struct T x = { 'x', 'y' };
struct T y, z;
b = f(a, 2);
c = f(f(a, 2), 3);
e = f((d = f(a, 2)), 3);
y = g(x);
z = g(g(x));
printf("a = { %d, %f, '%c' }\n", a.x, a.d, a.c);
printf("b = { %d, %f, '%c' }\n", b.x, b.d, b.c);
printf("c = { %d, %f, '%c' }\n", c.x, c.d, c.c);
printf("d = { %d, %f, '%c' }\n", d.x, d.d, d.c);
printf("e = { %d, %f, '%c' }\n", e.x, e.d, e.c);
printf("x = { '%c', '%c' }\n", x.a, x.b);
printf("y = { '%c', '%c' }\n", y.a, y.b);
printf("z = { '%c', '%c' }\n", z.a, z.b);
return 0;
}
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