Compilare: main.cpp: In function 'int main()': main.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < s2.length() ; i ++) ~~^~~~~~~~~~~~~ main.cpp:35:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ok == s2.length()) ~~~^~~~~~~~~~~~~~ main.cpp:44:40: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::__cxx11::basic_string<char>::size_type {aka long unsigned int}' [-Wformat=] printf("%d\n" , l * s2.length()); ^ main.cpp:63:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < s1.length() ; j ++) ~~^~~~~~~~~~~~~ main.cpp:78:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(top == s2.length()) ~~~~^~~~~~~~~~~~~~ main.cpp:19:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("anagrame3.in" , "r" , stdin); ^ main.cpp:20:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("anagrame3.out" , "w" , stdout); ^ main.cpp:22:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n" , &p); ^