C provides math library to manipulate mathematical operations.
You must include math.h to implement mathematical operations.
Here is an illustration code for mathematical functions usage:
#include <stdio.h>
#include <stdlib.h>
//from ww w .j a v a2s. com
#include <math.h>
int main() {
float a;
float b;
float pi = 3.14;
a = 0.5;
printf("value a = % .2f \n",a);
b = abs(-a);
printf("abs(a)=% .2f \n",b);
b = acos(a);
printf("acos(a)=% .2f \n",b);
b = asin(a);
printf("asin(a)=% .2f \n",b);
b = atan(a);
printf("abs(a)=% .2f \n",b);
b = atan2(a,5);
printf("atan(a,5)=% .2f \n",b);
b = cos(a);
printf("cos(a)=% .2f \n",b);
b = sin(a);
printf("sin(a)=% .2f \n",b);
b = tan(a);
printf("tan(a)=% .2f \n",b);
b = sqrt(a);
printf("sqrt(a)=% .2f \n",b);
return 0;
}
The code above generates the following result.