Compilare: user.cpp: In function ‘int main()’: user.cpp:25:42: warning: operation on ‘nrSol’ may be undefined [-Wsequence-point] s[++nrSol].a=s[nrSol-1].c; ^ user.cpp:33:42: warning: operation on ‘nrSol’ may be undefined [-Wsequence-point] s[++nrSol].a=s[nrSol-1].c; ^ user.cpp:10:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.in", "r", stdin); ^ user.cpp:11:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("armonica.out", "w", stdout); ^ user.cpp:13:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b); ^