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# include <stdio.h>
# define HexBase 16
int HexadecimalToInteger(char string[]) {
// The standalone Number *10* here in the FOR LOOP is a complementary value to make the hexadecimal function output correct values.
int DecimalNumberTotal = 0;
for (int i = 0;string[i] != '\0'; ++i) {
if (string[i] >= '0' && string[i] <= '9') {
DecimalNumberTotal = HexBase * DecimalNumberTotal + string[i] - '0';
}
else if (string[i] >= 'a' && string[i] <= 'f') {
DecimalNumberTotal = HexBase * DecimalNumberTotal + (string[i] - 'a' + 10);
}
else if (string[i] >= 'A' && string[i] <= 'F') {
DecimalNumberTotal = HexBase * DecimalNumberTotal + (string[i] - 'A' + 10);
}
}
return(DecimalNumberTotal);
}
// THE MAIN BLOCK
int main () {
char TheHexString[1000];
printf("Give me a Hexadecimal to convert (Without the prefix 0x)\n\n");
while (scanf("%s", &TheHexString) != EOF) {
int res = HexadecimalToInteger(TheHexString);
printf("The result is : %d\n\n", res);
}
return 0;
}
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