PROGRAMMING:Example of nonparametric function

Please execute the following code to analyze and understand the meaning of the function.
```
#include
void print_ line(){
printf("===========================\n");
}
void print_ message(){
printf("This is a C program.\n");
}
int main(){
print_ line();
print_ message();
print_ line();
return 0;
}
```
###Input example:
```in
```
###Output example:
```out
===========================
This is a C program.
===========================
```







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