Compilare: user.c: In function ‘main’: user.c:38:13: warning: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration] memcpy(temp,&command[2],j-2); ^ user.c:38:13: warning: incompatible implicit declaration of built-in function ‘memcpy’ [enabled by default] user.c:52:13: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] while (j<strlen(command)) ^ user.c:52:22: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] while (j<strlen(command)) ^ user.c:68:22: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] while (j<strlen(command)) ^ user.c:73:13: warning: incompatible implicit declaration of built-in function ‘memcpy’ [enabled by default] memcpy(temp,&command[2],j-2); ^ user.c:23:9: warning: variable ‘repx’ set but not used [-Wunused-but-set-variable] int repx[50000],repy[50000]; ^ user.c:21:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.c:29:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f," %[^\n]s",command); ^