Compilare: main.c: In function 'main': main.c:12:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(F,"%d", &n); ^~~~~~~~~~~~~~~~~~ main.c:21:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(F,"%d", &x[i]); ^~~~~~~~~~~~~~~~~~~~~ main.c:22:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(F,"%d", &y[i]); ^~~~~~~~~~~~~~~~~~~~~ main.c:30:5: warning: 'aria' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(G,"%.5f", aria); ^~~~~~~~~~~~~~~~~~~~~~~