Write a C program to read binary number from user and find one's complement of binary number. How to find one's complement of a binary number in C.

Input binary number: 01000011

Ones's complement: 10111100

Happy coding ;)

**Example:**Input binary number: 01000011

Ones's complement: 10111100

### Required knowledge:

Basic C programming, For loop, String#### One's complement

One's complement of a binary number is defined as value obtained by inverting all binary bits i.e. swapping all 1's to 0's and all 0's to 1's.### Program:

/** * C program to find 1's complement of a binary number */ #include <stdio.h> #include <string.h> #define SIZE 8 int main() { char binary[SIZE + 1], onesComp[SIZE + 1]; int i, error=0; /* * Reads binary value from user */ printf("Enter any %d bit binary value: ", SIZE); gets(binary); /* * Stores all inverted bits of binary value to onesComp */ for(i=0; i<SIZE; i++) { if(binary[i]=='1') { onesComp[i] = '0'; } else if(binary[i]=='0') { onesComp[i] = '1'; } else { printf("Invalid Input"); error = 1; break; } } onesComp[SIZE] = '\0'; if(error==0) { printf("\nOriginal binary = %s\n", binary); printf("Ones complement = %s", onesComp); } return 0; }

Output

Enter any 8 bit binary value: 00001111

Original binary = 00001111

Ones complement = 11110000

Original binary = 00001111

Ones complement = 11110000

Happy coding ;)

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