Why it outputs the value not the index ?

Question

#include<stdio.h>
int RecursiveLinearSearch(int t[],int size,int value);
int RecursiveLinearSearch(int t[],int size,int value){
if (size<0) return -1;
else if (t[size]==value) return size;
return (t,size-1,value);
}
int main (){
int t[]={5,9,13,45,33};
int index;
index=RecursiveLinearSearch(t,5,45);
printf("index=%d",index);
return 0;
}

Answer 1

You forgot the name of the function.
return RecursiveLinearSearch(t,size-1,value);

Comma is an operator in C/C++ (a, b) == b that's why ((t, size-1), value) returns value.

Answer 2

You have to write name of the function after the last return statement

return RecursiveLinearSearch(t, size-1, value);

Answer 3

Yeah,thanks for your answears :)