Why only one test case is passed

#1

#include
using namespace std;
int linersearch(int a[], int n, int key){
for(int i=0; i<n; i++){
if(a[i]==key){
return i;
}
}
return -1;
}
int main() {
int n;
cin>>n;
int a[n];
int i;
for(i-0; i<n; i++){
cin>>a[i];
}

int key;
cin>>key;


cout<<linersearch(a,n,key)<<endl;
return 0;

}

#2

@rathidevesh906_1dcc73a061c159bb u wrote i-0 instead i=0 in for loop

#3

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