Compilare: user.c: In function ‘main’: user.c:19:5: warning: implicit declaration of function ‘sqrt’ [-Wimplicit-function-declaration] sqrtElement = sqrt(element); ^ user.c:19:19: warning: incompatible implicit declaration of built-in function ‘sqrt’ [enabled by default] sqrtElement = sqrt(element); ^ user.c:7:15: warning: variable ‘file2’ set but not used [-Wunused-but-set-variable] FILE *file1, *file2; ^ user.c:13:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &M); ^ user.c:14:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &N); ^ user.c:18:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &element); ^