DecToHex.c

// decimal to hexadecimal

#include <stdio.h>

int main()
{
    int number, cnt, i;
    char hex[32]; 

    printf("Enter decimal number: ");
    scanf("%d", &number);

    cnt = 0;
    while (number > 0) {
        switch (number % 16) {
        case 10:
            hex[cnt] = 'A';
            break;
        case 11:
            hex[cnt] = 'B';
            break;
        case 12:
            hex[cnt] = 'C';
            break;
        case 13:
            hex[cnt] = 'D';
            break;
        case 14:
            hex[cnt] = 'E';
            break;
        case 15:
            hex[cnt] = 'F';
            break;
        default:
            hex[cnt] = (number % 16) + 0x30;
        }
        number = number / 16;
        cnt++;
    }

    printf("Hexadecimal value is: ");
    for (i = (cnt - 1); i >= 0; i--)
        printf("%c", hex[i]);
    printf("\n");
    return 0;
}