/in/foo.cc: In function 'int main()':
/in/foo.cc:32:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   32 |                         if(c[i]=d[j])
      |                            ~~~~^~~~~
/in/foo.cc:34:42: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   34 |                                 for(k=0;k<strlen(b[i]);k++)
      |                                         ~^~~~~~~~~~~~~