Compilare: user.c: In function ‘main’: user.c:59:9: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(D,0,sizeof(D)); ^ user.c:59:9: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default] user.c:44:19: warning: unused variable ‘j’ [-Wunused-variable] int t,i,n,max,j; ^ user.c:47:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d" ,&n,&t); ^ user.c:50:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d" ,&x[i],&y[i],&z[i]); ^