C Language Programs for beginners............

Simple C Programs

	1. Program to Find Sum and Average of Three Real Numbers. #include<conio.h> #include<stdio.h> void main() { float a, b, c, sum, avg; clrscr(); printf("\nEnter value of three numbers: "); scanf("%f %f %f", &a, &b, &c); sum = a + b + c; avg = sum / 3; printf("\nSum = %.2f", sum); printf("\nAverage = %.2f", avg); getch(); }
	2. Program to Find Area of Square and Circumference of a Circle. #include<stdio.h> #include<conio.h> #define PI 3.142 void main() { float len, r, area, circum; clrscr(); printf("\nEnter length of a square: "); scanf("%f", &len); area = len * len; printf("\nEnter radius of a circle: "); scanf("%f", &r); circum = 2 * PI * r; printf("\nArea of square = %.2f", area); printf("\nCircumference of circle = %.2f", circum); getch(); }
	3.Program to find Sphere Surface Area and Volume of a Sphere. /* Sphere Surface Area = 4 * PI * r * r Volume of Sphere = (4/3) * PI * r * r * r */ #include<stdio.h> #include<conio.h> #define PI 3.142 void main() { float r, area, vol; clrscr(); printf("\nEnter radius of Sphere: "); scanf("%f", &r); area = 4 * PI * r * r; vol = (4/3) * PI * r * r * r; printf("\nSphere Surface Area = %.2f", area); printf("\nVolume of Sphere = %.2f", vol); getch(); }
	4. Program to Find Area of a Triangle using Hero Formula. #include<stdio.h> #include<conio.h> #include<math.h> void main() { float a, b, c, s, area; clrscr(); back: printf("\nEnter three sides of a triangle: "); scanf("%f %f %f", &a, &b, &c); if (a==0 || b==0 || c==0) { printf("\nValue of any side should not be equal to zero\n"); goto back; } if (a+b { printf("\nSum of two sides should not be less than third\n"); goto back; } s = (a + b + c) / 2; area = sqrt(s * (s - a) * (s - b) * (s - c)); printf("\n\nArea of triangle: %.2f", area); getch(); }
	5. Program to Find Simple Interest and Compound Interest. /* SI = (p * r * t) / 100    CI = p * pow((1 + r/100), t) - p */ #include<stdio.h> #include<conio.h> #include<math.h> void main() { float p, r, t, si, ci; clrscr(); printf("\nEnter priciple, rate and time: "); scanf("%f %f %f", &p, &r, &t); si = (p * r * t) / 100; ci = p * pow((1 + r/100), t) - p; printf("\n\nSimple Interest: %.2f", si); printf("\n\nCompound Interest: %.2f", ci); getch(); }
	6. Program to Convert Temperature from Degree Centigrade to Fahrenheit. /* f = (1.8*c) + 32 */ #include<stdio.h> #include<conio.h> void main() { float c, f; clrscr(); printf("\nEnter temperature in degree Centigrade: "); scanf("%f", &c); f = (1.8*c) + 32; printf("\n\nTemperature in degree Fahrenheit: %.2f", f); getch(); }
	7. Program to Convert Time in Seconds to Hours Minutes and Seconds. #include<stdio.h> #include<conio.h> void main() { long sec, hr, min, t; clrscr(); printf("\nEnter time in seconds: "); scanf("%ld", &sec); hr = sec/3600; t = sec%3600; min = t/60; sec = t%60; printf("\n\nTime is %ld hrs %ld mins %ld secs", hr, min, sec); getch(); }
	8. Program to Swap Values of Two Variables using Third Variable. #include<stdio.h> #include<conio.h> main() { int a, b, temp; clrscr(); printf("\nEnter any two numbers: "); scanf("%d %d", &a, &b); printf("\n\nBefore Swapping:\n"); printf("\na = %d\t b=%d", a,b); temp = a; a = b; b = temp; printf("\n\nAfter Swapping:\n"); printf("\na = %d\t b=%d", a,b); getch(); }
	9. Program to Swap Values of Two Variables Without using Third Variable. #include<stdio.h> #include<conio.h> void main() { int a, b, temp; clrscr(); printf("\nEnter any two numbers: "); scanf("%d %d", &a, &b); printf("\n\nBefore Swapping:\n"); printf("\na = %d\t b=%d", a,b); a = a + b; b = a - b; a = a - b; printf("\n\nAfter Swapping:\n"); printf("\na = %d\t b=%d", a,b); getch(); }
	10. Program to Calculate the Net Salary. /* Basic salary of an employee is input through the keyboard. The DA is 25% of the basic salary while the HRA is 15% of the basic salary. Provident Fund is deducted at the rate of 10% of the gross salary(BS+DA+HRA). Program to Calculate the Net Salary. */ #include<stdio.h> #include<conio.h> void main() { float basic_sal, da, hra, pf, gross_sal, net_sal; clrscr(); printf("\nEnter basic salary of the employee: Rs. "); scanf("%f", &basic_sal); da = (basic_sal * 25)/100; hra = (basic_sal * 15)/100; gross_sal = basic_sal + da + hra; pf = (gross_sal * 10)/100; net_sal = gross_sal - pf; printf("\n\nNet Salary: Rs. %.2f", net_sal); getch(); } Control Statements programs in next post........................