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#include <stdio.h> | |
#include <stdlib.h> | |
// Number | |
typedef struct { | |
int value; | |
} Number; | |
Number new (int value); | |
void add (Number * ctx, int value); | |
void sub (Number * ctx, int value); | |
// Number API | |
struct { | |
Number (* new) (int value); | |
void (* add) (Number * ctx, int value); | |
void (* sub) (Number * ctx, int value); | |
} Number_API = { | |
.new = new, | |
.add = add, | |
.sub = sub, | |
}; | |
// #MAT | |
// MAT(matA).mul(matB) | |
// using string cat (##) | |
// #NUM | |
// Number_API.add(A, B) | |
// NUM(A).add(B) | |
// TODO: 請問這裡該如何實作? | |
#define NUM(n) Number_API | |
// Main | |
int main () { | |
Number n = Number_API.new(100); | |
printf("%d\n", n.value); // 100 | |
Number_API.add(&n, 10); | |
printf("%d\n", n.value); // 110 | |
NUM(n).add(10); // TODO | |
// n.add(10); // TODO | |
printf("%d\n", n.value); // 120 | |
return 0; | |
} | |
// Number_API Implement | |
Number new (int value) { | |
return (Number) { | |
.value = value, | |
}; | |
} | |
void add (Number * ctx, int value) { | |
ctx->value += value; | |
}; | |
void sub (Number * ctx, int value) { | |
ctx->value -= value; | |
}; |
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