Compilare: user.c: In function ‘main’: user.c:54:2: warning: implicit declaration of function ‘close’ [-Wimplicit-function-declaration] close(in); ^ user.c:12:6: warning: unused variable ‘lungime’ [-Wunused-variable] int lungime = 0; ^ user.c:18:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d",&M,&N); ^ user.c:22:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&A[i]); ^ user.c:24:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&B[j]); ^ user.c:51:2: warning: ‘max’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (k = 0; k < max; k++) ^ user.c:32:11: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] C[k] = A[i]; ^