C program to convert String into Hexadecimal.

In this program we will read a String and convert the string into Hexadecimal String. We will convert each character of the string in it’s equivalent hexadecimal value and insert the converted value in a string and finally print the Hexadecimal String.

Converting String into Hexadecimal String using C program


/*C program to convert String into Hexadecimal.*/

#include <stdio.h>
#include <string.h>

int main()
{
	unsigned char str[100],strH[200];
	int i,j;
	
	printf("Enter string: ");
	scanf("%[^\n]s",str);
	
	printf("\nString is: %s\n",str);
	
	/*set strH with nulls*/
	memset(strH,0,sizeof(strH));
	
	/*converting str character into Hex and adding into strH*/
	for(i=0,j=0;i<strlen(str);i++,j+=2)
	{ 
		sprintf((char*)strH+j,"%02X",str[i]);
	}
	strH[j]='\0'; /*adding NULL in the end*/
	
	printf("Hexadecimal converted string is: \n");
	printf("%s\n",strH);
	
	
	return 0;
}

    Enter string: Hello world, This is my first program.

    String is: Hello world, This is my first program.
    Hexadecimal converted string is: 
    48656C6C6F20776F726C642C2054686973206973206D792066697273742070726F6772616D2E