Compilare: user.c: In function ‘euclid’: user.c:2:6: warning: type of ‘a’ defaults to ‘int’ [enabled by default] long euclid(a,b){ ^ user.c:2:6: warning: type of ‘b’ defaults to ‘int’ [enabled by default] user.c:3:13: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if((a&b==0)||(b%a==0)) ^ user.c: In function ‘main’: user.c:14:5: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘long int *’ [-Wformat=] fscanf(in,"%d\n",&n); ^ user.c:17:16: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘long int *’ [-Wformat=] fscanf(in,"%d %d",&a,&b); ^ user.c:17:16: warning: format ‘%d’ expects argument of type ‘int *’, but argument 4 has type ‘long int *’ [-Wformat=] user.c:18:16: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(out,"%d\n",euclid(a,b)); ^ user.c:14:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d\n",&n); ^ user.c:17:22: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&a,&b); ^