Main.cc: In function ‘int main()’:
Main.cc:5:26: error: conflicting declaration ‘long long unsigned int a [100]’
unsigned long long a[100];
^
Main.cc:4:9: note: previous declaration as ‘int a [100]’
int a[100],n;
^
Main.cc:11:9: error: ‘i’ was not declared in this scope
for(i=4;i<=n;i++);
^
Main.cc:11:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
for(i=4;i<=n;i++);
^~~
Main.cc:12:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
a[i]=a[i-3]+a[i-2]+a[i-1];
^
Main.cc:12:4: error: ‘i’ was not declared in this scope
a[i]=a[i-3]+a[i-2]+a[i-1];
^