Compilare: main.c: In function 'cmmdc': main.c:12:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:19:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a); ^~~~~~~~~~~~~~~~~ main.c:20:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&b); ^~~~~~~~~~~~~~~~~