Compilare: main.cpp: In function 'int poz(char, int)': main.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ap > 0 && i < s1.length() && i != -1) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < s2.length() ; i ++) ~~^~~~~~~~~~~~~ main.cpp:47:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ok == s2.length()) ~~~^~~~~~~~~~~~~~ main.cpp:56:39: 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:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < s1.length() ; j ++) ~~^~~~~~~~~~~~~ main.cpp:84:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(top == s2.length()) ~~~~^~~~~~~~~~~~~~ main.cpp:34:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &p); ^