C Tutorial
#include <stdio.h> int main() { char str[100]; char *p; printf(“Enter any string: “); fgets(str, 100, stdin); /* Assigning the base address str[0] to pointer * p. p = str is same as p = str[0] */ p=str; printf(“The input string is: “); //’\0′ signifies end of the string while(*p!=’\0′) printf(“%c”,*p++); return 0; }
Program to Check Prime Number #include <stdio.h> int main() { int n, i, flag = 0; printf(“Enter a positive integer: “); scanf(“%d”, &n); for (i = 2; i <= n / 2; ++i) { // condition for non-prime if (n % i == 0) { flag = 1; break; } } if (n == 1) … Read more
To convert Celsius to Fahrenheit #include <stdio.h> #include <stdlib.h> int main() { float celsius, fahrenheit; printf(“\nEnter temperature in celsius: “); scanf(“%f”, &celsius); fahrenheit = (1.8) * celsius + 32; printf(“\n%f deg celsius is %f fahrenheit\n”, celsius, fahrenheit); return 0; }
Simple Calculator using switch Statement #include <stdio.h> int main() { char operator; double first, second; printf(“Enter an operator (+, -, *,): “); scanf(“%c”, &operator); printf(“Enter two operands: “); scanf(“%lf %lf”, &first, &second); switch (operator) { case ‘+’: printf(“%.1lf + %.1lf = %.1lf”, first, second, first + second); break; case ‘-‘: printf(“%.1lf – %.1lf = %.1lf”, … Read more
Program to Print ASCII Value #include <stdio.h> int main() { char c; printf(“Enter a character: “); scanf(“%c”, &c); // %d displays the integer value of a character // %c displays the actual character printf(“ASCII value of %c = %d”, c, c); return 0; }
Program to Find the Size of Variables #include<stdio.h> int main() { int intType; float floatType; double doubleType; char charType; // sizeof evaluates the size of a variable printf(“Size of int: %ld bytes\n”, sizeof(intType)); printf(“Size of float: %ld bytes\n”, sizeof(floatType)); printf(“Size of double: %ld bytes\n”, sizeof(doubleType)); printf(“Size of char: %ld byte\n”, sizeof(charType)); return 0; }
Program to Add Two Integers #include <stdio.h> int main() { int number1, number2, sum; printf(“Enter two integers: “); scanf(“%d %d”, &number1, &number2); // calculating sum sum = number1 + number2; printf(“%d + %d = %d”, number1, number2, sum); return 0; }
Program to Multiply Two Numbers #include <stdio.h> int main() { double a, b, product; printf(“Enter two numbers: “); scanf(“%lf %lf”, &a, &b); // Calculating product product = a * b; // Result up to 2 decimal point is displayed using %.2lf printf(“Product = %.2lf”, product); return 0; }
Program to print half pyramid using * #include<stdio.h> int main() { int i, j, rows; printf(“Enter number of rows: “); scanf(“%d”, &rows); for (i=1; i<=rows; ++i) { for (j=1; j<=i; ++j) { printf(“* “); } printf(“\n”); } return 0; }
Program to Print English Alphabets #include <stdio.h> int main() { char c; for (c = ‘A’; c <= ‘Z’; ++c) printf(“%c “, c); return 0; }