一小段C++程序,关于ltoa函数的

最新推荐文章于 2022-05-09 20:42:53 发布

原创最新推荐文章于 2022-05-09 20:42:53 发布 · 4.4k 阅读

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#c++ #buffer #integer #string #output

本文提供了一个使用 C 语言将整数转换为字符串的例子，通过 ltoa 函数展示如何以不同的进制（十进制、十六进制、二进制）来表示同一个整数值。

Example.

/* ltoa example */ #include <stdio.h> #include <stdlib.h> int main () { int i; char buffer [sizeof(long)*8+1]; printf ("Enter a number: "); scanf ("%d",&i); ltoa (i,buffer,10); printf ("decimal: %s/n",buffer); ltoa (i,buffer,16); printf ("hexadecimal: %s/n",buffer); ltoa (i,buffer,2); printf ("binary: %s/n",buffer); return 0; } Convert long integer value to string. Converts a long integer value to a null-terminated string using the specified radix and stores the result in the given buffer. If radix is 10 and value is negative the string is preceded by the minus sign (-). With any other radix, value is always considered unsigned. buffer should be large enough to contain any possible value: (sizeof(long)*8+1) for radix=2. Parameters. value Value to be represented as a string. buffer Buffer where to store the resulting string. radix Numeral radix in which value has to be represented, between 2 and 36. Return Value. A pointer to the string. Portability. Not defined in ANSI-C. Supported by some compilers.Output:
Enter a number: 16021977 decimal: 16021977 hexadecimal: f479d9 binary: 111101000111100111011001