View Compilation Error

0_0_13097738_20675.c: In function 'main':
0_0_13097738_20675.c:9:29: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         int nim = 0;        for(int i=0; i<m; i++)
                             ^
0_0_13097738_20675.c:9:29: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code