该程序(factorial.c
)正在运行,但它不会在结束时返回提示符,除非您按回车键:
#include <stdio.h>
int main()
{
int num, i, fact = 1;
printf("Enter a number to know its factorial: ");
scanf("%d",&num);
for(i=num;i>0;i--){
fact = fact * i;
}
printf("Factorial of %d! = %d",num,fact);
return 0;
}
编译并运行程序:
bash-4.2$ gcc factorial.c
bash-4.2$ ./a.out
Enter a number to know its factorial: 5
Factorial of 5! = 120bash-4.2$
当我按下回车键后:
bash-4.2$
答案1
printf
这与通过命令行包含的行为相同。它也使用相同的 C 库来实现。注意行为:
$ printf "Factorial of %d! = %d" 4 24
Factorial of 4! = 24$
如果您希望它像这样显示,则必须包含文字换行符 ( \n
) :printf
$ printf "Factorial of %d! = %d\n" 4 24
Factorial of 4! = 24
$