Compilare: user.c: In function ‘main’: user.c:72:6: warning: unused variable ‘q’ [-Wunused-variable] int q; ^ user.c:13:15: warning: unused variable ‘b’ [-Wunused-variable] char c;int a,b,cont=0; ^ user.c:13:13: warning: unused variable ‘a’ [-Wunused-variable] char c;int a,b,cont=0; ^ user.c:12:20: warning: variable ‘l’ set but not used [-Wunused-but-set-variable] fseek(f,0,0);char l[500]; ^ user.c:14:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:19:8: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:25:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:29:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:35:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:43:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:54:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:63:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:78:8: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:84:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:88:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:94:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&c,1,1,f);l[cont]=c;cont++; ^ user.c:103:13: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result]