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Data type of character constants in C and C++

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  • Difficulty Level : Easy
  • Last Updated : 16 Jun, 2022
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In C, data type of character constants is int, but in C++, data type of same is char.  If we save below program as test.c then we get 4 as output (assuming size of integer is 4 bytes) and if we save the same program as test.cpp then we get 1(assuming size of char is 1 byte) 


// C++ program demonstrating that data type of character
// constants in C++ is same as 'char'
#include <iostream>
using namespace std;
int main() {
    cout << sizeof('a');
    return 0;
// This code is contributed by sarajadhav12052009


#include <stdio.h>
int main()
  printf("%lu", sizeof('a'));
  return 0;

Output of C++ program:


Output of C program:



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