c - Union nested in a structure returning garbage value -

c - Union nested in a structure returning garbage value -

everything working fine, except nested union not getting updated. using mingw compiler. learning coding regarding c , trying out nested union , other stuff when problem came up. please tell me error of code, along possible debugging. couldn't find wrong it.

output:

a:3

b:3

l.a: 8

l.b: 5

union: -536870912

#include<stdio.h> #include<conio.h> typedef struct { int a; int b; } two; typedef union { int c; float d; } ad; typedef struct { int a; int b; 2 l; advertisement n; /*this nested union not getting updated*/ } one; void trr(one *p); int main() { 1 tr={2,3,{4,5},{.d=5.43}}; trr(&tr); printf("a: %d\nb: %d\nl.a: %d\nl.b: %d\nunion: %d",tr.a,tr.b,tr.l.a,tr.l.b,tr.n.d); homecoming 0; } void trr(one *p) { p->a=(*p).a+1; p->l.a=p->l.a*2; }

tr.n.d has type float. %d format specifier tells printf treat int however. seek changing format specifier %f instead

printf("a: %d\nb: %d\nl.a: %d\nl.b: %d\nunion: %f" // ^

alternatively, initialise int fellow member of union:

one tr={2,3,{4,5},{.c=42}};

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