1 #include <stdio.h> 2 main()3 int main(){ 4 char buffer[5]; 5 6 read(0, buffer, 4); 7 8 if( buffer[0] == 'a' ) { 9 puts("First letter good"); 10 } else { 11 puts("First letter bad"); 12 } 13 14 return 0; 15 } 16