The role of printf in c language

printf is the standard output function in C language, used to output formatted data to the console. Its functions are as follows: Output data: Output the data in variables, constants or expressions to standard output. Formatted output: Specify the format of the output data and control the appearance and accuracy of the display. Control the output position: Control the display position of the output data, which can be achieved through line feeds, tabs and carriage returns.

The role of printf in C language

printf is the C language standard output function, used to send messages to the console Output formatted data. Its main functions are as follows:

Output data:

printf is used to output data in variables, constants or expressions to standard output (usually terminal window). It can output a variety of data types, including integers, floating point numbers, characters, and strings.

Formatted output:

printf allows you to specify the format of the output data in order to control the appearance and accuracy of the display. It uses format specifiers to specify the output format, for example:

• %d: Outputs integers in decimal format
• %f: Outputs in float Output floating point number in point format
• %s: Output string
• %.2f: Output floating point number with two decimal places precision

Control the output position:

printf can pass newline characters (\n), tab characters (\t ) and carriage return characters (\r) to control the display position of the output data.

Example:

The following C code example demonstrates how to use printf to output formatted data:

#include <stdio.h>

int main() {
    int age = 25;
    float pi = 3.141592;
    char name[] = "John Doe";

    printf("年龄：%d\n", age);
    printf("圆周率：%.2f\n", pi);
    printf("姓名：%s\n", name);

    return 0;
}

Output:

<code>年龄：25
圆周率：3.14
姓名：John Doe</code>

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