View Compilation Error

0_0_38144217_11337.c: In function 'main':
0_0_38144217_11337.c:11:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int i=0;i<k;i++)
     ^
0_0_38144217_11337.c:11:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_38144217_11337.c:16:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int j=left;j<right;j++)
    ^
0_0_38144217_11337.c:18:14: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
              for(int p=left;p<right;p++)
              ^