View Compilation Error

0_0_14105564_18098.c: In function 'main':
0_0_14105564_18098.c:6:2: error: unknown type name 'bool'
  bool isW = false, isY = false, isH = false;
  ^
0_0_14105564_18098.c:6:13: error: 'false' undeclared (first use in this function)
  bool isW = false, isY = false, isH = false;
             ^
0_0_14105564_18098.c:6:13: note: each undeclared identifier is reported only once for each function it appears in
0_0_14105564_18098.c:9:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i = 0; i < T; i++)
   ^
0_0_14105564_18098.c:9:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_14105564_18098.c:13:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int k = 0; '\0' != str[k]; k++)
    ^
0_0_14105564_18098.c:16:12: error: 'true' undeclared (first use in this function)
      isW = true;
            ^