/in/foo.c:5:1: error: unknown type name 'bool'
 bool print[101];
 ^~~~
/in/foo.c:7:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'int'
 int k=0;
 ^~~
/in/foo.c: In function 'main':
/in/foo.c:18:4: error: 'fat' undeclared (first use in this function)
    fat[t][0]++;
    ^~~
/in/foo.c:18:4: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:24:3: error: 'k' undeclared (first use in this function)
   k++;
   ^
/in/foo.c:28:4: error: unknown type name 'bool'
    bool flag=true;
    ^~~~
/in/foo.c:28:14: error: 'true' undeclared (first use in this function)
    bool flag=true;
              ^~~~
/in/foo.c:30:10: error: 'not' undeclared (first use in this function)
      if (not print[fat[i][j]]) 
          ^~~
/in/foo.c:30:14: error: expected ')' before 'print'
      if (not print[fat[i][j]]) 
              ^~~~~
/in/foo.c:32:12: error: 'false' undeclared (first use in this function)
       flag=false;
            ^~~~~