how can I convert character to integer number

Question

How could I change an array of character (string) to an integer number without using any ready function (ex atoi();) for example :-

 char a[5]=\'4534\';
         


        

Answer 1

I prefer to use the std::atoi() function to convert string into a number data type. In your example you have an non-zero terminated array "\0", so the function will not work with this code.

Consider to use zero terminated "strings", like:

char *a = "4534";

int mynumber = std::atoi( a );   // mynumber = 4534