C Program to Convert Hexadecimal to Decimal Value

Write a program to convert hexadecimal to a decimal value

Input Format
The input contains a Hexadecimal value

Output Format
Print its equivalent decimal value

Constraint
1<=Length<=50Sample Input 1

F

Sample Output 1

15

Code:

#include <stdio.h> #include <math.h> #include <string.h> int main() { char hex[17]; long long decimal, place; int i = 0, val, len; decimal = 0; place = 1; scanf("%[^\n]",hex); len = strlen(hex); len--; for(i=0; hex[i]!='\0'; i++) { if(hex[i]>='0' && hex[i]<='9') { val = hex[i] - 48; } else if(hex[i]>='a' && hex[i]<='f') { val = hex[i] - 97 + 10; } else if(hex[i]>='A' && hex[i]<='F') { val = hex[i] - 65 + 10; } decimal += val * pow(16, len); len--; } printf("%lld", decimal); return 0; }
Code language: C/AL (cal)

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