Compilare: user.cpp: In function ‘int src(int)’: user.cpp:31:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<v[key].size() && v[key][i]!=val) ^ user.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==v[key].size()) ^ user.cpp: In function ‘int main()’: user.cpp:47:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:49:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d%d%d", &a, &b, &c, &d, &e); ^ user.cpp:51:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &vasile[i]); ^