Below is a C program that will reverse (input) text.

#include<stdio.h>

int main(){
	int length = 0;
	char name[30];
	printf("enter your name: ");
	scanf("%[^\n]", name);

	//determine the length of the string
	while(name[length] != '\0')
		length ++;
	
	while(length >= 0){
		printf("%c", name[length]);
		length --;
	}

	return 0;
}

output: