How to input just one at scanf?-CodePudding

char command[6];
int command_num=0;
scanf("%s %d", command, &command_num);

If command is "top", I want to input only command, not command_num. But when i input just command, input is continue. How can I solve this?

CodePudding user response：

Your description is basically pseudo code, just translate it to C:

char command[LARGE_ENOUGH]; // probably no reason to allocate just 6 bytes

if(scanf("%s", command) != 1) // read only command and check result
{ 
  /* handle error - abort program etc */
}

if(strcmp(command, "top") != 0) // if command wasn't top
{
  if(scanf("%d", &command_top) != 1)
  {
    /* handle error - abort program etc */
  }
}

Place this all in a while loop if needed.

However, a better solution might be to take the input as string and accept digits in the string as commands.