write a c program that converts an integer into another base. the input integer
ID: 638695 • Letter: W
Question
write a c program that converts an integer into another base. the input integer could be in decimal,octal,or hexadecimal. the output could be converted into either of base. a sample run is blow. the user's respone in again in boldface.
integer conversion program
Base of input (d=decimal, h=hexadecimal, o=octal) : d
Number :178
Base of output(d=decimal, h=hexadecimal, o=octal) : h
The integer 178 in decimal is equivalent to b2 in hexadecimal.
Another number? (Y/N) Y
Base of output(d=decimal, h=hexadecimal, o=octal) : o
Number: 423
Base of output(d=decimal, h=hexadecimal, o=octal) : d
The integer 423 in octal is equivalent to 275 in decimal.
Another Number (Y/N) N
Goodbye!
Explanation / Answer
#include <stdio.h>
#include <stdlib.h>
char letters(int r); // prototypes function for converting 10's to A's and so on, base 11+ will work
int main() {
int base;
int d; //declares decimal integer
int d_clone; // clones d for a loop
int r; //declares remainder integer
int *number; //pointer variable to make an array based on how long the converted number is
int count = 0; //these three are counters
int i = 0;
int j = 0;
printf("-- Decimal To Any Base Up to 36 Converter 0.1b -- ");
printf(" Enter a decimal integer to convert: ");
scanf("%d", &d);
printf(" ");
printf("Enter the base you want it converted to: ");
scanf("%d", &base);
printf(" ");
d_clone = d; //copies the decimal number for a loop
if(d < 0) {
printf("Cannot convert negative numbers.");
} //end if
if(base==0 | base==1) {
printf("Cannot have 0 or 1 as a base.");
} //end if
else {
do {
r = d_clone % base; //finds remainder everytime the number is divided by the base
d_clone = d_clone / base; //divides the original number by the base
if(r >= 10) { // if the remainder is 10+ it will convert to letters
r = (char) r;
r = letters(r);
printf("%d R %c ", d_clone, r);
count++;
} // end if
else {
r = (int) r;
printf("%d R %d ", d_clone, r);
count++; //counts how many times it is divisible, represents how long the number is
} //end else
} //end while
while(d_clone != 0); //stops when the number is 0
number = malloc(count * sizeof(int)); //allocates memory for the converted numbers digits
printf(" ");
do {
r = d % base;
d = d / base;
number[i] = r; //sets the digits of the converted number in an array
i++;
}
while(i<count); //executes loop until number[0] through number[i] are filled
j = count - 1; // accounts for the 0 index in the array
printf("The number in base %d is: ", base);
for(j = count - 1; j >= 0; j--) {
if(number[j] >= 10) {
number[j] = letters(number[j]);
printf("%c", number[j]);
} //end if
else {
printf("%d", number[j]); //prints the converted number
} //end else
} //end for
free(number); //frees the allocated memory
} //end else
getch();
return 0;
}
char letters(int r) {
if(r==10){
return 'A';
}
if(r==11){
return 'B';
}
if(r==12){
return 'C';
}
if(r==13){
return 'D';
}
if(r==14){
return 'E';
}
if(r==15){
return 'F';
}
if(r==16){
return 'G';
}
if(r==17){
return 'H';
}
if(r==18){
return 'I';
}
if(r==19){
return 'J';
}
if(r==20){
return 'K';
}
if(r==21){
return 'L';
}
if(r==22){
return 'M';
}
if(r==23){
return 'N';
}
if(r==24){
return 'O';
}
if(r==25){
return 'P';
}
if(r==26){
return 'Q';
}
if(r==27){
return 'R';
}
if(r==28){
return 'S';
}
if(r==29){
return 'T';
}
if(r==30){
return 'U';
}
if(r==31){
return 'V';
}
if(r==32){
return 'W';
}
if(r==33){
return 'X';
}
if(r==34){
return 'Y';
}
if(r==35){
return 'Z';
}
}
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