/in/foo.cc: In function 'int main()':
/in/foo.cc:7:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<strlen(ch1);i++){
~^~~~~~~~~~~~
/in/foo.cc:11:9: warning: array subscript has type 'char' [-Wchar-subscripts]
f[z]=true;
^
/in/foo.cc:14:13: warning: array subscript has type 'char' [-Wchar-subscripts]
if(!f[i]){printf("Failed");return 0;}
^
/in/foo.cc:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<strlen(ch3);i++)
~^~~~~~~~~~~~