Write a C program to check whether the given number is perfect square or not.
#include <math.h>
int main() {
int i, ch, value, flag = 0;
/* choose the method to check for perfect square */
printf("Method to manipulate:\n");
printf("1. With Math Function(sqrt)\n");
printf("2. Without Match Function(sqrt)\n");
printf("Enter your choice:");
scanf("%d", &ch);
/* get the input value */
if (ch == 1 || ch == 2) {
printf("Enter your input value:");
scanf("%d", &value);
}
switch (ch) {
case 1:
/*
* checking for perfect square
* without using built in function
*/
for (i = 1; i <= value; i++) {
if (i * i == value) {
flag = 1;
break;
}
}
break;
case 2:
/* check for perfect square using built in func */
if (sqrt(value) * sqrt(value) == value)
flag = 1;
break;
default:
printf("Wrong option!!\n");
goto end;
}
/* print the results */
if (flag == 0)
printf("%d is not a perfect square\n", value);
else
printf("%d is a perfect square\n", value);
end:
return 0;
}
Note:
gcc perfectSqr.c -lm => linked math library since we have used math function sqrt().
Output:
jp@jp-VirtualBox:~/$ ./a.out
Method to manipulate:
1. With Math Function(sqrt)
2. Without Match Function(sqrt)
Enter your choice:2
Enter your input value:100
100 is a perfect square
Method to manipulate:
1. With Math Function(sqrt)
2. Without Match Function(sqrt)
Enter your choice:2
Enter your input value:100
100 is a perfect square
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