View Compilation Error

0_0_15343164_13002.c: In function 'main':
0_0_15343164_13002.c:21:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=2;i<=n;i++)
         ^
0_0_15343164_13002.c:21:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_15343164_13002.c:45:9: error: unknown type name 'bool'
         bool isOK=false;
         ^
0_0_15343164_13002.c:45:19: error: 'false' undeclared (first use in this function)
         bool isOK=false;
                   ^
0_0_15343164_13002.c:45:19: note: each undeclared identifier is reported only once for each function it appears in
0_0_15343164_13002.c:47:18: error: 'true' undeclared (first use in this function)
             isOK=true;
                  ^