View Compilation Error

0_0_30062817_29329.c: In function 'main':
0_0_30062817_29329.c:18:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(long long tt=1;tt<=t;tt++)
     ^
0_0_30062817_29329.c:18:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_30062817_29329.c:64:21: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
                     for(int j=i+1;j<=30;j++)
                     ^