Compilare: user.cpp: In function ‘int main()’: user.cpp:59:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f,"%d",&p); ^ user.cpp:63:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f,"%d%d",&n,&m); ^ user.cpp:68:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f,"%d",&v[i][j]); ^ user.cpp:120:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f,"%d",&nr); ^ user.cpp:125:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fs(f,"%d %c",&x,&c); ^ user.cpp:83:18: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[x][y]=0; ^