C语言教程-详解C语言中的goto语句

goto示例
让我们看一个在C语言中使用goto语句的简单示例。
#include <stdio.h>
int main()
{
int num, i = 1;
printf("Enter the number whose table you want to print?");
scanf("%d", &num);
table:
printf("%d x %d = %d\n", num, i, num * i);
i++;
if (i <= 10)
goto table;
}
输出:
Enter the number whose table you want to print?10
10 x 1 = 10
10 x 2 = 20
10 x 3 = 30
10 x 4 = 40
10 x 5 = 50
10 x 6 = 60
10 x 7 = 70
10 x 8 = 80
10 x 9 = 90
10 x 10 = 100
何时应该使用goto?
只有在需要同时使用单个语句中断多个循环时,使用goto才是可取的。考虑以下示例:
#include <stdio.h>
int main()
{
int i, j, k;
for (i = 0; i < 10; i++)
{
for (j = 0; j < 5; j++)
{
for (k = 0; k < 3; k++)
{
printf("%d %d %d\n", i, j, k);
if (j == 3)
{
goto out;
}
}
}
}
out:
printf("came out of the loop");
}
arduinoCopy code
0 0 0
0 0 1
0 0 2
0 1 0
0 1 1
0 1 2
0 2 0
0 2 1
0 2 2
0 3 0
came out of the loop
以上代码中,通过使用goto语句,我们可以在j等于3时中断多个循环。