Discussion
Predict the output of following C program
#include <stdio.h>
struct Point
{
int x, y, z;
};
int main()
{
struct Point p1 = {.y = 0, .z = 1, .x = 2};
printf("%d %d %d", p1.x, p1.y, p1.z);
return 0;
}
Answer: B
Correct answer: 2 0 1
These are designated initialisers, introduced in C99: each value names the member it initialises, so their order in the braces is irrelevant. .x = 2, .y = 0, .z = 1 whatever order they are written in, and the program prints 2 0 1.
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