/in/lab5.c: In function 'remove_spaces':
/in/lab5.c:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < strlen(str); i++)
                       ^
/in/lab5.c: In function 'char_to_infix':
/in/lab5.c:109:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < strlen(str); i++)
                       ^
/in/lab5.c: In function 'calculate_postfix':
/in/lab5.c:246:31: warning: unused variable 'result' [-Wunused-variable]
     double rightNum, leftNum, result;
                               ^~~~~~
/in/lab5.c: In function 'main':
/in/lab5.c:542:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int i = 0; i < strlen(eachLine); i++)
                               ^
/in/lab5.c:555:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for (int i = counts; i < strlen(eachLine); i++)
                                    ^
/in/lab5.c: In function 'operator_priority':
/in/lab5.c:82:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^