Compilare: user.cpp: In function ‘int main()’: user.cpp:42:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &nrlin, &nrcol, &k); ^ user.cpp:45:40: 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:50:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^ user.cpp:70:20: warning: ‘g’ may be used uninitialized in this function [-Wmaybe-uninitialized] t=alg(r, g); ^ user.cpp:70:20: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized]