foo.cc: In function 'int main()':
foo.cc:49:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%[^\r]",str[0]),getchar();
     ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~
foo.cc:51:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n),getchar();
     ~~~~~~~~~~~~~~^~~~~~~~~~
foo.cc:54:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%[^\r]",str[i]),getchar();
         ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~

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