Compilare: user.c: In function ‘main’: user.c:64:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.c:67:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x[i]); ^ user.c:69:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&m); ^ user.c:72:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&op,&v); ^ user.c: In function ‘mod_1’: user.c:35:4: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] return m-1; ^ user.c: In function ‘mod_2’: user.c:55:4: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] return m; ^ user.c: In function ‘main’: user.c:35:4: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] return m-1; ^ user.c:26:8: note: ‘m’ was declared here int m; ^