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#include <stdio.h>
int main() {
// Declare the variables
int a;
// Ask user to input a value greater than 0
do{
printf("Enter a positive non-zero number: ");
scanf("%d", &a);
}while(a <= 0);
// Return an integer value
return 0;
}

Declare the variable as an integer type.
Prompt the user to input a positive non-zero number which is a number greater than 0.
Use the do-while loop, and if the variable is less or equals 0, then keep asking the user for input until it is greater than 0.
Return an integer value.