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32 lines
565 B
32 lines
565 B
#include <stdio.h>
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#include <math.h>
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typedef struct point {
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double x, y;
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} point;
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/*
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Nested anonymous struct declaration compiles with MS extensions only.
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So you have to use -fms-extensions flag with gcc / clang.
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C11 standard allows no typedef in the nested anonymous declaration :(
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*/
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typedef struct {
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struct point;
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double z;
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} threepoint;
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double threelength(threepoint p) {
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return sqrt(p.x * p.x + p.y * p.y + p.z * p.z);
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}
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int main () {
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threepoint p = {.x = 3, .y = 0, .z = 4};
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printf("p is %g units from the origin\n", threelength(p));
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}
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