Compilare: user.cpp: In function ‘int main()’: user.cpp:104:45: 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",&n,&m,&a,&b,&c); ^ user.cpp:106:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&x,&y,&z); ^ user.cpp:137:11: warning: ‘nsol’ may be used uninitialized in this function [-Wmaybe-uninitialized] nc=parinte[0][nc]; ~~^~~~~~~~~~~~~~~