Compilare: user.cpp: In function ‘int main()’: user.cpp:13:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &m, &n, &w1, &w2); ^ user.cpp:19:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &poz, &prevl); ^ user.cpp:24:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &poz, &l); ^ user.cpp:53:29: warning: ‘res_dr4’ may be used uninitialized in this function [-Wmaybe-uninitialized] res+=max(res_dr4-res_st1-w2+2,0); ^ user.cpp:55:29: warning: ‘res_dr3’ may be used uninitialized in this function [-Wmaybe-uninitialized] res+=max(res_dr3-res_st2-w1+2,0); ^ user.cpp:55:29: warning: ‘res_st2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:53:29: warning: ‘res_st1’ may be used uninitialized in this function [-Wmaybe-uninitialized] res+=max(res_dr4-res_st1-w2+2,0); ^