convertir minúsculas a mayúsculas en c usando el ejemplo de código ascii

Posterior a consultar especialistas en esta materia, programadores de diversas áreas y maestros dimos con la solución al dilema y la plasmamos en esta publicación.

Ejemplo: convertir string a mayúsculas en c

For those of you who want to uppercase a string and store it in a variable(that was what I was looking for when I read these answers).#include//<-- You need this to use printf.#include//<-- You need this to use string and strlen() function.#include//<-- You need this to use toupper() function.intmain(void)
    string s ="I want to cast this";//<-- Or you can ask to the user for a string.unsignedlongint s_len =strlen(s);//<-- getting the length of 's'.  //Defining an array of the same length as 's' to, temporarily, store the case change.char s_up[s_len];// Iterate over the source string (i.e. s) and cast the case changing.for(int a =0; a < s_len; a++)// Storing the change: Use the temp array while casting to uppercase.  
        s_up[a]=toupper(s[a]);// Assign the new array to your first variable name if you want to use the same as at the beginning
    s = s_up;printf("%s n", s_up);//<-- If you want to see the change made.//If you want to lowercase a string instead, change toupper(s[a]) to tolower(s[a]).

Si tienes algún titubeo o forma de ascender nuestro enunciado eres capaz de realizar una interpretación y con placer lo leeremos.

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