/in/foo.c: In function 'bubbleSort':
/in/foo.c:5:21: error: 'str' undeclared (first use in this function); did you mean 'srt'?
    5 |      int len=strlen(str);
      |                     ^~~
      |                     srt
/in/foo.c:5:21: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:7:31: error: 'le' undeclared (first use in this function); did you mean 'len'?
    7 |                 for(int j=0;j<le-1-i;j++){
      |                               ^~
      |                               len