In z/OS C einen String in Großbuchstaben umwandeln?

In z/OS C, you can convert a string to uppercase using the `toupper` function from the C standard library. Here’s a simple example of how to do this:

```c
#include <stdio.h>
#include <ctype.h>

void toUpperCase(char *str) {
while (*str) {
*str = toupper((unsigned char)*str);
str++;
}
}

int main() {
char myString[] = "Hello, World!";
toUpperCase(myString);
printf("Uppercase: %s\n", myString);
return 0;
}
```

In this example, the `toUpperCase` function iterates through each character of the string and converts it to uppercase using `toupper`. Make sure to include the necessary headers (`<stdio.h>` and `<ctype.h>`) for the functions used.