View Compilation Error

0_0_13846449_9930.c: In function 'solve':
0_0_13846449_9930.c:50:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int i=0; i<n; i++)
     ^
0_0_13846449_9930.c:50:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_13846449_9930.c:52:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int y=0; y<rows; y++) {
     ^
0_0_13846449_9930.c:53:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for (int x=0; x<cols; x++) {
         ^