42 lines
668 B
C
42 lines
668 B
C
#include <stdio.h>
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#include <stdlib.h>
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struct point {
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float x;
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float y;
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};
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void move(struct point * punkt, float dx, float dy) {
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punkt->x += dx;
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punkt->y += dy;
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}
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int main() {
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struct point * ptr;
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ptr = malloc(sizeof(struct point)); // impl. Typcast des Pointers
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if (ptr != NULL) {
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ptr->x = 10;
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ptr->y = 20;
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printf("\nx-Koordinate von p: %f", ptr->x);
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printf("\ny-Koordinate von p: %f", ptr->y);
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free(ptr);
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printf("\n");
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printf("\nnach free():");
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// Dangling Pointer!
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printf("\nx-Koordinate von p: %f", ptr->x);
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printf("\ny-Koordinate von p: %f", ptr->y);
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printf("\n\n");
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}
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return 0;
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}
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