Compilare: main.cpp: In function 'int main()': main.cpp:25:41: warning: narrowing conversion of 'v1' from 'int' to 'double' inside { } [-Wnarrowing] V.push_back({v1, 1.0 / v2, i, 1}); ^ main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < V.size(); i++) ~~^~~~~~~~~~ main.cpp:33:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < W.size(); i++){ ~~^~~~~~~~~~ main.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < S.size(); i++) ~~^~~~~~~~~~ main.cpp:45:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < S.size(); i++) ~~^~~~~~~~~~ main.cpp:20:24: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ main.cpp:24:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &v1, &v2); ^