Compilare: user.c: In function ‘main’: user.c:25:24: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] a[i]=48+(a[i]-48)^(c-48)^1; ^ user.c:16:9: warning: unused variable ‘vr’ [-Wunused-variable] int vr=0; ^ user.c:13:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.c:17:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d\n",&n); ^ user.c:19:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&a[i]); ^ user.c:20:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"\n"); ^ user.c:24:24: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] {fscanf(f,"%c",&c); ^ user.c:27:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"\n"); ^