View Compilation Error

0_0_26367822_23730.c:2:1: error: unknown type name 'using'
 using namespace std;
 ^
0_0_26367822_23730.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
 using namespace std;
                 ^
0_0_26367822_23730.c: In function 'main':
0_0_26367822_23730.c:23:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int i=1;i<=max;i++)
         ^
0_0_26367822_23730.c:23:9: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code