View Compilation Error

0_0_36744434_6938.c: In function 'main':
0_0_36744434_6938.c:7:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int i = 1 ; i <= N1 ; i++)
     ^
0_0_36744434_6938.c:7:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_36744434_6938.c:11:6: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
      for(int j = 1 ; j <= N2 ; j++)
      ^