c program reading output as input code example

Example 1: Syntax To Take Input In C

Integer: Input: scanf("%d", &intVariable); Output: printf("%d", intVariable);
Float: Input: scanf("%f", &floatVariable); Output: printf("%f", floatVariable);
Character: Input: scanf("%c", &charVariable); Output: printf("%c", charVariable);

Example 2: read a document from console in c

#include<stdio.h>
int main(int argc,char *argv[]){
	FILE *in=fopen(*++argv,"r");
	char c;
	while((c=fgetc(in))!=EOF)
		putchar(c);
	fclose(in);
	return 0;
}