Compilare: main.cpp: In function 'int main()': main.cpp:41:31: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=] fprintf(g,"%d\n",lv.size()); ^ main.cpp:17:21: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",a);n=strlen(a); ^ main.cpp:27:21: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",b);m=strlen(b); ^