Compilare: user.cpp: In function ‘int main()’: user.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[sir[1]-'!'].size();j++) ~^~~~~~~~~~~~~~~~~~~~~ user.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz[k]<v[sir[k]-'!'].size() && v[sir[k]-'!'][poz[k]]<=pozz) poz[k]++; ~~~~~~^~~~~~~~~~~~~~~~~~~~~ user.cpp:36:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[k]==v[sir[k]-'!'].size()) {p=1;break;} ~~~~~~^~~~~~~~~~~~~~~~~~~~~~ user.cpp:15:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaj2.in","r",stdin); ^ user.cpp:16:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mesaj2.out","w",stdout); ^ user.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",sir+1); ^ user.cpp:22:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:26:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",sir+1); ^