Compilare: main.cpp:14:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^ main.cpp: In function 'int main()': main.cpp:20:31: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for ( ;p = b.find(a, p) + 1; s[x++]=p-1); ^ main.cpp:16:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(input, "rt", stdin); ^ main.cpp:17:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen(output, "wt", stdout); ^