CS计算机代考程序代写 //note the difference b/w ex3.c and ex4.c

//note the difference b/w ex3.c and ex4.c
//could you explain it?

#include
#include // needed for sleep()

int main(int argc, char *argv[]){
while(1){
printf(“Hello, program is runing right now\n”);
sleep(1);
}
}