用逗号printf连接变量 [英] concatenate variables with commas printf

问题描述

我有一个带有两个变量的C程序

Hi I have a C program which has two variables

int a = 1;
int b = 2;

我要使用printf打印的位置：

where I want to use printf to print:

1,2

这样我可以插入结果

我尝试过：

printf("f\n","f\n", a,",",b);

但是这不起作用。

如果我尝试不添加逗号：

If I try without adding the comma:

printf("f\n","f\n", a,b);

仅打印变量a。因此，确实存在两个问题-如何在同一行上同时打印a和b，但更好的是如何用逗号分开打印它们。

it only prints out variable a. so really there are two problems - how do i print out both a and b on the same line, but even better how to i print them out separated by a comma.

谢谢您的帮助！

推荐答案

就像这样：

printf("%d,%d\n", a, b);

printf（）要求后面跟随一个格式字符串可变数量的参数（至少与格式化字符串中的修饰符数量一样）。这就是您的代码无法正常工作的原因：

printf() expects a formatting string followed by a variable number of arguments (at least as much as the number of modifiers in the formatting string). That's why your code doesn't work:

printf("f\n","f\n", a,",",b);

此处，格式字符串为 f\n ，没有修饰符，因此从不使用其他参数。第二种方法也是如此。

Here, the formatting string is "f\n", there are no modifiers, so the other arguments are never used. The same applies to your second approach.

提示：请查看 printf（）联机帮助页。

Hint: have a look at printf() manpage.

这篇关于用逗号printf连接变量的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！