Compilare: user.cpp: In function ‘int main()’: user.cpp:103:80: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d%d%d%d", &t, &nrlin, &nrcol, &w, &xn, &xs, &yv, &ye); ^ user.cpp:107:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m[i][j]); ^ user.cpp: In function ‘void NV(int, int, int)’: user.cpp:6:15: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] int e, i, j; ^