Compilare: user.c:48:1: warning: return type defaults to ‘int’ [enabled by default] listDisplayS(List l) { ^ user.c:58:1: warning: return type defaults to ‘int’ [enabled by default] listDisplayE(List l) { ^ user.c: In function ‘listDisplayS’: user.c:56:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘listDisplayE’: user.c:66:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:79:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &n, &c); ^ user.c:81:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &aux); ^ user.c:86:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &aux); ^ user.c:90:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &aux); ^