foo.cc: In function 'int main()':
foo.cc:19:17: error: 'strcpy' was not declared in this scope
   19 |                 strcpy(temp2,b[i]);strcpy(b[i],b[j]);strcpy(b[j],temp2);
      |                 ^~~~~~
foo.cc:2:1: note: 'strcpy' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
    1 | #include <iostream>
  +++ |+#include <cstring>
    2 | using namespace std;
foo.cc:23:23: error: 'strcmp' was not declared in this scope
   23 |                 int s=strcmp(b[i],b[j]);
      |                       ^~~~~~
foo.cc:23:23: note: 'strcmp' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
foo.cc:26:21: error: 'strcpy' was not declared in this scope
   26 |                     strcpy(temp2,b[i]);strcpy(b[i],b[j]);strcpy(b[j],temp2);
      |                     ^~~~~~
foo.cc:26:21: note: 'strcpy' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
foo.cc: In function 'int mystrcmp(char*, char*)':
foo.cc:38:11: error: 'strlen' was not declared in this scope
   38 |     int A=strlen(a);
      |           ^~~~~~
foo.cc:38:11: note: 'strlen' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
foo.cc:43:15: error: 'strcmp' was not declared in this scope
   43 |         int t=strcmp(a,b);
      |               ^~~~~~
foo.cc:43:15: note: 'strcmp' is defined in header '<cstring>'; did you forget to '#include <cstring>'?
foo.cc: In function 'int main()':
foo.cc:11:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |     scanf("%s",b[i]);
      |     ~~~~~^~~~~~~~~~~
foo.cc:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |     scanf("%s",a[i]);
      |     ~~~~~^~~~~~~~~~~

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