C-Language legal identifiers

1 //problem Description2 //enter a string to determine whether it is a valid identifier for C. 3 //4 //5 //Input6 //The input data contains multiple test instances, and the first row of the data is an integer n, representing the number of test instances, followed by n rows of input data, each of which is a string of no more than 50 length. 7 //8 //9 //OutputTen //for each set of input data, output one line. If the input data is a valid identifier for C, output "yes", otherwise, output "no".  One  A#include <stdio.h> -#include <string.h> - intMain () the { -     intN; -  -      while(SCANF ("%d", &n)! =EOF) +     { - GetChar (); +         while(n--) A         { at             Chara[ -];intk=0, tag=0, s=1; - gets (a); -              -k=strlen (a); -              for(inti =0; I < K; ++i) -             { in                 if(i==0) -                 { to                     if((A[i) <'a'&& A[i] >'_') || A[i] >'Z'|| a[i]<'A'|| (a[i]<'_'&& a[i]>'Z' )) +                     { -tag=1; the                     } *                 } $                 if(i>0&&tag!=1)Panax Notoginseng                 { -  the  +                     if(A[i] = ='_'|| (A[i] >='A'&& A[i] <='Z') || (A[i] >='a'&& A[i] <='Z') || (A[i] >='0'&& A[i] <='9' )) A                     { thes=s+1; +                     } -  $                 } $  -  -             } the              -                         if(s==k)Wuyiprintf"Yes"); the                         if(s!=k| | tag==1) -printf"No"); Wuprintf"\ n"); -  About         } $     } -}

C-Language legal identifiers