View Compilation Error

0_0_23393302_31973.c: In function 'main':
0_0_23393302_31973.c:10:7: error: expected expression before '/' token
   k=1;// strcat(a,b);// j=strlen(a);// for(i=0;i<n;i++)
       ^
0_0_23393302_31973.c:10:22: error: expected expression before '/' token
   k=1;// strcat(a,b);// j=strlen(a);// for(i=0;i<n;i++)
                      ^
0_0_23393302_31973.c:10:37: error: expected expression before '/' token
   k=1;// strcat(a,b);// j=strlen(a);// for(i=0;i<n;i++)
                                     ^
0_0_23393302_31973.c:16:2: error: 'f' undeclared (first use in this function)
  f[0]=1;
  ^
0_0_23393302_31973.c:16:2: note: each undeclared identifier is reported only once for each function it appears in