Incorrect operation of the strcmp function

When you enter the string "enqueue 7" in a character array, the trailing zero is also added.

In this dam

  for (int i = 0; i < 7; ++i) { TempLocalChar[i] = LocalChar[i]; } 

The substring "enqueue" is copied without a descriptive zero. Therefore, the data if statements with strcmp call

  if (strcmp(TempLocalChar, enqueue) == 1 ) { //Бла-бла-бла } 

have undefined behavior, since the strcmp function compares only strings with a terminating zero (by the way, this is the definition of the string, that is, there must be a terminating zero)

You should after copying the substring will add a trailing zero. For example,

  for (int i = 0; i < 7; ++i) { TempLocalChar[i] = LocalChar[i]; } TempLocalChar[7] = '\0'; 

Or you could compare strings using another standard function, namely memcmp , which allows you to explicitly specify how many characters are compared.

For example,

  if ( memcmp( TempLocalChar, enqueue, 7 ) == 0 ) { //Бла-бла-бла } 

By the way, if you want to check strings for equality, you need to write

  if (strcmp(TempLocalChar, enqueue) == 0 ) { ^^^^ //Бла-бла-бла } 

Keep in mind that the C standard does not guarantee that if the strings are not equal, then exactly 1 or -1 will be returned. The function can return any positive or negative value. Why such a comparison

  if (strcmp(TempLocalChar, enqueue) == 1 ) { //Бла-бла-бла } 

in any case is not correct. It would be correct to write, for example

  if (strcmp(TempLocalChar, enqueue) > 0 ) { //Бла-бла-бла } 

or

  if (strcmp(TempLocalChar, enqueue) < 0 ) { //Бла-бла-бла } 

Only returning 0 if the rows are equal is guaranteed.

Generally speaking, the use of magic numbers such as 7, used in a cycle, makes programs error prone, since it is not known what the user actually entered into the character array, whether there are more than 7 characters or less.

Also note that the gets function is not reliable and is no longer supported by the C standard. Instead, use the standard function fgets , which allows you to tell how much you can enter into an array of characters.

You can write

 fgets( LocalChar, sizeof( localChar ), stdin ); 

This function adds the array also a newline character. You can remove it from the array as follows.

 localChar[ strcspn( localChar, "\n" ) ] = '\0';