Compilare: user.cpp: In function ‘bool check(int)’: user.cpp:24:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p != 0 && val[p] != x) ^ user.cpp: In function ‘void del(int)’: user.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x == val[lst[r]]) ^ user.cpp:40:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(urm[p] != 0 && val[urm[p]] != x) ^ user.cpp:44:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(val[urm[p]] == x) ^ user.cpp: In function ‘int main()’: user.cpp:113:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < strlen(v)-cuvL; i++) ^ user.cpp:89:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &v[0]); ^ user.cpp:92:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &v[i]); ^ user.cpp:94:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &cuv[0]); ^ user.cpp:98:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &cuv[i]); ^ user.cpp:108:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &cuv[i]); ^