convert char to int c++

To convert a char to an int in C++, you can use the built-in typecasting or conversion functions. Here is an example of how you can perform this conversion:

char ch = '5';
int num = ch - '0';

The ASCII value of the character '5' is 53. By subtracting the ASCII value of '0' (which is 48), you can obtain the integer value 5. This works because the ASCII values of the digits '0' to '9' are sequential.

Let's break down the steps:

1. Declare a char variable ch and assign it the value '5'.
2. Subtract the ASCII value of '0' from ch. This converts the character '5' to the integer value 5.
3. Store the resulting integer value in an int variable num.

Now, the variable num will hold the integer value 5.

It's important to note that this method only works when the character represents a digit. If the character is not a digit, the resulting value may not be meaningful.

I hope this explanation helps! Let me know if you have any further questions.