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Simple Practice Programs in C, , 1. Calculate the area and circumference of circle., #include<stdio.h>, int main(), {, int rad;, float PI = 3.14, area, ci;, printf("\nEnter radius of circle: ");, scanf("%d", &rad);, area = PI * rad * rad;, printf("\nArea of circle : %f ", area);, ci = 2 * PI * rad;, printf("\nCircumference : %f ", ci);, return (0);, }, , 2. To find the area of triangle, #include<stdio.h>, int main(), {, float b,h,area;, printf("Enter Height and Base Of Triangle : ");, scanf("%f %f",&h,&b);, area = (h*b)/2;, printf("Area of Triangle is: %f\n",area);, return 0;, }