Borderou de evaluare (job #800561)

Compilare: main.c: In function 'main': main.c:21:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 21 | fscanf(fin, "%d", &a); | ^~~~~~~~~~~~~~~~~~~~~ main.c:23:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 23 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:28:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 28 | fscanf(fin, "%d", &a); | ^~~~~~~~~~~~~~~~~~~~~ main.c:30:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 30 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:35:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 35 | fscanf(fin, "%d", &a); | ^~~~~~~~~~~~~~~~~~~~~ main.c:37:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 37 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:42:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 42 | fscanf(fin, "%d", &a); | ^~~~~~~~~~~~~~~~~~~~~ main.c:44:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 44 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:55:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 55 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:60:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 60 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:65:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 65 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:70:13: warning: ignoring return value of 'fscanf' declared with attribute 'warn_unused_result' [-Wunused-result] 70 | fscanf(fin, "%d", &b); | ^~~~~~~~~~~~~~~~~~~~~ main.c:14:25: warning: 'c' is used uninitialized [-Wuninitialized] 14 | while(c != '+' && c != '-' && c != ':'&& c != '*' ){ | ~~^~~~~~ main.c:9:10: note: 'c' was declared here 9 | char c; | ^