Compilare: user.cpp: In function ‘void readMatrix()’: user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gauss.in","r",stdin); ^ user.cpp:12:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&nrlin, &nrcol); ^ user.cpp:15:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%f",&mat[i][j]); ^ user.cpp: In function ‘void afisare()’: user.cpp:80:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gauss.out","w",stdout); ^ user.cpp: In function ‘void rezolvareGauss()’: user.cpp:21:12: warning: ‘j’ is used uninitialized in this function [-Wuninitialized] int i, j, k; ^ user.cpp:47:25: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int u = i + 1; u <= nrlin; ++u){ ^