View Compilation Error

0_0_28628606_18177.c:8:1: error: unknown type name 'bool'
 bool prime(int n)
 ^
0_0_28628606_18177.c: In function 'prime':
0_0_28628606_18177.c:10:21: error: 'false' undeclared (first use in this function)
     if(n==1) return false;
                     ^
0_0_28628606_18177.c:10:21: note: each undeclared identifier is reported only once for each function it appears in
0_0_28628606_18177.c:11:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int i=2;i<=sqrt(n);i++)
     ^
0_0_28628606_18177.c:11:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_28628606_18177.c:14:12: error: 'true' undeclared (first use in this function)
     return true;
            ^
0_0_28628606_18177.c: In function 'main':
0_0_28628606_18177.c:22:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=2;i<n/2;i++)
         ^