Compilare: main.cpp: In function 'int main()': main.cpp:45:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("sortnet.in", "r", stdin); ^ main.cpp:46:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("sortnet.out", "w", stdout); ^ main.cpp:47:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d%d", &n, &m); ^ main.cpp:50:93: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf (" <%d,%d>", &comp[i][j].a, &comp[i][j].b), comp[i][j].a--, comp[i][j].b--; ^