Compilare: main.cpp: In function 'int main()': main.cpp:61:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<vecin[m].size();j++) ~^~~~~~~~~~~~~~~~ main.cpp:40:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.out","w",stdout); ^ main.cpp: In function 'void cit(int&)': main.cpp:25:41: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,1,Lim,stdin),pos=0; ^ main.cpp:32:41: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf,1,Lim,stdin),pos=0; ^