How to express thousands place in C language

In C language, the thousand character is used to represent the thousands separator, which can be achieved by the following method: manually add a comma (,), adding one every three digits. Use the C language library function: set the locale (setlocale()). Get the thousands separator character (localeconv()). Output numbers in custom format (printf()).

The thousand character in C language

The thousand character is used to represent the thousands separator in numbers. This can make the numbers easier to read and understand. In the C language, there is no built-in thousands placeholder. However, it can be achieved manually by:

Method

1. ##Use comma (,) as delimiter:

   Add a comma every three digits in the number. For example: 123,456,789

2. Use C language library function:

   Use
   • setlocale() function Set the locale to enable thousands separators.
   Use the
   • localeconv() function to get the thousands separator character.
   Use the
   • printf() function to output numbers in a custom format. For example:

#include <locale.h>
#include <stdio.h>

int main() {
    setlocale(LC_NUMERIC, "");  // 设置语言环境
    struct lconv *lc = localeconv();  // 获取千位分隔符
    printf("%s%d\n", lc->thousands_sep, 123456789);  // 输出带千位分隔符的数字
    return 0;
}

Application Example

The following example demonstrates how to use a comma as the thousands separator:

int number = 123456789;
printf("%,d\n", number);  // 输出 123,456,789

Example of using C language library function:

#include <locale.h>
#include <stdio.h>

int main() {
    setlocale(LC_NUMERIC, "");
    struct lconv *lc = localeconv();
    printf("%s123456789\n", lc->thousands_sep);  // 输出 123,456,789
    return 0;
}

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