Compilare: main.cpp: In function 'int main()': main.cpp:45:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = n + 1; i < a.length(); ++i) ~~^~~~~~~~~~~~ main.cpp:46:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (z[i] == n) ~~~~~^~~~ main.cpp:53:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = n + 1; cnt < 1000 && i < a.length() + 1; ++i) ~~^~~~~~~~~~~~~~~~ main.cpp:54:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (z[i] == n) ~~~~~^~~~ main.cpp:53:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int i = n + 1; cnt < 1000 && i < a.length() + 1; ++i) ^~~ main.cpp:61:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' return 0; ^~~~~~ main.cpp:40:9: warning: unused variable 'm' [-Wunused-variable] int m = b.length(); ^ main.cpp:35:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in", "r", stdin); ^ main.cpp:36:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.out", "w", stdout); ^