Compilare: user.c: In function ‘main’: user.c:7:5: warning: unused variable ‘c’ [-Wunused-variable] int c = 0; ^ user.c:6:12: warning: unused variable ‘m’ [-Wunused-variable] int a, b,i,m; ^ user.c:6:10: warning: unused variable ‘i’ [-Wunused-variable] int a, b,i,m; ^ user.c:14:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%d",&a); ^ user.c:15:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%d",&b); ^