c identifier is undefined string

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
c identifier is undefined string	0.73	0.9	3784	69	34
c	0.23	0.3	3855	98	3
identifier	1.79	0.5	4856	96	10
is	1.28	0.9	2875	69	2
undefined	1.31	0.6	4360	84	9
string	1.03	0.6	9292	36	6

Keyword	CPC	PCC	Volume	Score
c identifier is undefined struct	0.19	0.2	7141	25
identifier string is undefined in c	1.05	0.8	1688	65
string identifier is undefined	0.6	0.2	5940	36
identifier is undefined error in c	1.39	0.9	5971	27
c++ identifier is undefined to_string	1.44	0.4	9647	79
c identifier file is undefined	0.37	0.1	6563	24
identifier true is undefined c	1.35	0.6	7967	27
c++ cstring identifier is undefined	1.89	0.6	1967	44
identifier is undefined c++	0.55	0.5	3877	68
identifier is undefined c++ class	1.97	1	426	99
c identifier is undefined	0.75	1	6409	53
c++ identifier str is undefined	1.03	0.7	8246	80
c++ identifier is undefined strptime	0.59	0.7	3967	57
identifier strerror is undefined	1.32	0.6	5645	61
string c++ identifier is undefined	1.49	0.1	5379	75
uses undefined struct c++	1.76	0.7	4751	33
identifier strptime is undefined	1.4	0.3	9542	23
identifier system is undefined c++	1.04	1	2413	31
true is undefined in c	1.63	0.4	3651	70