c语言中将整数转换成字符串

Given an ASCII string (char[]) and we have to convert it into Hexadecimal string (char[]) in C.

给定一个ASCII字符串(char [])，我们必须在C中将其转换为十六进制字符串(char [])。

Logic:

逻辑：

To convert an ASCII string to hex string, follow below-mentioned steps:

要将ASCII字符串转换为十六进制字符串，请执行以下步骤：

• Extract characters from the input string and convert the character in hexadecimal format using %02X format specifier, %02X gives 0 padded two bytes hexadecimal value of any value (like int, char).

  从输入字符串中提取字符，并使用％02X格式说明符将其转换为十六进制格式， ％02X为0填充两个字节的任意值的十六进制值(如int ， char )。

• Add these two bytes (characters) which is a hex value of an ASCII character to the output string.

  将这两个字节(字符)添加为输出字符串，这两个字节是ASCII字符的十六进制值。

• After each iteration increase the input string's loop counter (loop) by 1 and output string's loop counter (i) by 2.

  每次迭代后，将输入字符串的循环计数器( loop )增大1，将输出字符串的循环计数器( i )增大2。

• At the end of the loop, insert a NULL character to the output string.

  在循环末尾，在输出字符串中插入一个NULL字符。

Example:

例：

    Input: "Hello world!"Output: "48656C6C6F20776F726C6421"

C程序将ASCII char []转换为十六进制char [] (C program to convert ASCII char[] to hexadecimal char[])

In this example, ascii_str is an input string that contains "Hello world!", we are converting it to a hexadecimal string. Here, we created a function void string2hexString(char* input, char* output), to convert ASCII string to hex string, the final output string is storing in hex_str variable.

在此示例中， ascii_str是包含“ Hello world！”的输入字符串。 ，我们将其转换为十六进制字符串。 在这里，我们创建了一个函数void string2hexString(char * input，char * output) ， 将ASCII字符串转换为十六进制字符串 ，最终的输出字符串存储在hex_str变量中。

#include <stdio.h>
#include <string.h>
//function to convert ascii char[] to hex-string (char[])
void string2hexString(char* input, char* output)
{
int loop;
int i; 
i=0;
loop=0;
while(input[loop] != '\0')
{
sprintf((char*)(output+i),"%02X", input[loop]);
loop+=1;
i+=2;
}
//insert NULL at the end of the output string
output[i++] = '\0';
}
int main(){
char ascii_str[] = "Hello world!";
//declare output string with double size of input string
//because each character of input string will be converted
//in 2 bytes
int len = strlen(ascii_str);
char hex_str[(len*2)+1];
//converting ascii string to hex string
string2hexString(ascii_str, hex_str);
printf("ascii_str: %s\n", ascii_str);
printf("hex_str: %s\n", hex_str);
return 0;
}

Output

输出量

ascii_str: Hello world!
hex_str: 48656C6C6F20776F726C6421

Read more...

...

• Octal literals in C language

  C语言的八进制文字

• Working with octal numbers in C language

  使用C语言处理八进制数

• Working with hexadecimal numbers in C language

  使用C语言处理十六进制数

翻译自: https://www.includehelp.com/c/convert-ascii-string-to-hexadecimal-string-in-c.aspx

c语言中将整数转换成字符串