What does %c%d mean in c language

In C, the format specifier "%c" is used to output a single character, while "%d" is used to output a decimal integer.

The meaning of %c and %d in C language

In C, "%c" and "%d" are format specifiers used in formatted strings to output character and numeric data.

• %c : Used to output a single character.
• %d : Used to output decimal integers.

Usage of format specifiers

The format specifier specifies how data is formatted and outputted to a screen or file. They are used with input/output functions such as printf() and scanf().

The format of the format specifier is as follows:

 <code class="c">%[标志][宽度][修饰符]类型</code>

• Flags: Control the format of the output, such as left alignment, right alignment, etc.
• Width: Specifies the minimum width of the output, and fill it with spaces when it is insufficient.
• Modifier: Specifies the size and format of the data type, such as short integers, long integers, etc.
• Type: Specify the data type to be output, such as characters, integers, floating point numbers, etc.

Examples of %c and %d

The following example shows how to use the %c and %d format specifiers:

 <code class="c">#include <stdio.h> int main() { char character = 'a'; int number = 10; printf("%c\n", character); // 输出字符a printf("%d\n", number); // 输出整数10 }</stdio.h></code>

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