View Compilation Error

0_0_29194354_20822.c: In function 'main':
0_0_29194354_20822.c:17:8: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
        for(int i = 0 ; i < m - 1 ; i++)
        ^
0_0_29194354_20822.c:17:8: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code