foo.cc: In function ‘int main()’:
foo.cc:7:18: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
7 | for(int i=0;i<s.size();)
| ~^~~~~~~~~
foo.cc:10:22: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
10 | for(int j=i;j<i+s1.size() ;j++)
| ~^~~~~~~~~~~~
foo.cc:16:26: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
16 | for(int k=0;k<s2.size();k++)cout<<s2[k];
| ~^~~~~~~~~~