chibrituri.c: In function 'main': chibrituri.c:10: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result chibrituri.c:8: warning: 'a1' may be used uninitialized in this function chibrituri.c:8: warning: 'b1' may be used uninitialized in this function chibrituri.c:8: warning: 'c1' may be used uninitialized in this function chibrituri.c:8: warning: 'd1' may be used uninitialized in this function