Borderou de evaluare (job #605310)

Eroare de compilare: main.c: In function 'main': main.c:28:26: error: 'c' undeclared (first use in this function); did you mean 'ch'? 28 | nr=nr*10+(10+c-'0'-k)%10; | ^ | ch main.c:28:26: note: each undeclared identifier is reported only once for each function it appears in main.c:13:14: warning: unused variable 'ult' [-Wunused-variable] 13 | char ch, ult; | ^~~ main.c:12:23: warning: unused variable 'p' [-Wunused-variable] 12 | int nr=0, s=0, k, p=0, d; | ^ main.c:14:5: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 14 | fscanf(fin, "%d", &k); | ^~~~~~~~~~~~~~~~~~~~~