By: Jeffrey in C Tutorials on 2012年03月16日 [フレーム]
This simple C program shows how to find square and square root for a given number.
#include <math.h> /* for sqrt() function */
#include <stdio.h>
int main()
{
/* variable named x with floating-point data type */
float x;
/* standard output writing a positive floating number */
printf("\nEnter one positive number (1, 2, 3. . .): ");
/* standard input reading floating number */
scanf("%f", &x);
printf("\nx = %f ", x);
printf("\nSquare for x is = %f", x * x);
// sqrt() is the predefined function, defined in math.h
printf("\nSquare root for x is = %f\n", sqrt(x));
return 0;
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