如何在int putenv（char * string）中放入2个char数组; 在C.

Question

I am trying to set a variable name and variable value in the environment of Windows by using this function

void env_add(char varname[], char varvalue[]) {

}

The problem is that i do not know how to put both of these variables to int putenv(char *string);

Should I combine them into one char array or not?

Thank you

Answer 1

Yes, you should combine them into a single string. The string has the form "name=value" .

char* buffer = (char*) malloc( strlen(name) + 1 + strlen(value) + 1 );

strcpy( buffer, name );
strcat( buffer, "=" );
strcat( buffer, value );

putenv( buffer );

free( buffer );