47 lines
761 B
C
47 lines
761 B
C
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#include <stdio.h>
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typedef struct point {
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float x;
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float y;
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} Point;
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Point add_points(Point a, Point b) {
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Point res = {};
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res.x = a.x + b.x;
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res.y = a.y + b.y;
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return res;
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}
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typedef char *CString;
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typedef CString (*StringFactory)(void);
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void upcall_test(StringFactory fun) {
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return fun();
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}
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static int counter = 0;
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static char* responses[] = { "Hello, world!", "Goodbye friend.", "co'oi prenu" };
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CString get_string1(void) {
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return responses[counter++ % 3];
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}
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CString get_string2(void) {
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return "Alternate string";
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}
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StringFactory get_downcall(int whichString) {
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switch (whichString % 2) {
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case 0:
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return get_string1;
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case 1:
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return get_string2;
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default:
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return 0;
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}
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}
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