Compilare: main.c: In function 'main': main.c:31:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("lgput.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:32:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("lgput.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:34:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%f %f",&n,&exp); ^~~~~~~~~~~~~~~~~~~~~~