View Compilation Error

0_0_15380621_16772.c: In function 'main':
0_0_15380621_16772.c:15:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for (int i=3; i<=n; i++) {
   ^
0_0_15380621_16772.c:15:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_15380621_16772.c:17:8: error: expected identifier or '(' before '&' token
    int &t = recur[f[i-1]][f[i]];
        ^
0_0_15380621_16772.c:18:8: error: 't' undeclared (first use in this function)
    if (t) {
        ^
0_0_15380621_16772.c:18:8: note: each undeclared identifier is reported only once for each function it appears in