View Compilation Error

0_0_14675973_7602.c: In function 'main':
0_0_14675973_7602.c:48:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for(int r=0;r<coun-1;r++)
     ^
0_0_14675973_7602.c:48:5: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code