View Compilation Error

0_0_35634024_24293.c: In function 'main':
0_0_35634024_24293.c:8:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int i=1;i<=n;i++){
     ^
0_0_35634024_24293.c:8:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_35634024_24293.c:11:9: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
         for(int j=0;j<slen;j++){
         ^
0_0_35634024_24293.c:13:17: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
                 for(int k=j;k>start;k--){
                 ^