I dette emne vil vi diskutere, hvordan vi skriver et regneprogram i programmeringssproget C. En lommeregner er en lille elektronisk enhed, der bruges til at udføre forskellige aritmetiske operationer som addition, subtraktion, multiplikation, division, procent, osv. Det gør vores beregninger nemmere og hurtigere. Det er en bærbar enhed, der kan bruges overalt til at udføre simple matematiske operationer. Vi bruger en videnskabelig eller sofistikeret lommeregner i nogle situationer, hvor vi skal løse komplekse beregninger som trigonometrifunktioner, eksponentielle operatorer, grader, radianer, logfunktioner, hyperbolske funktioner osv. Lad os diskutere de forskellige måder at skabe et regneprogram på C-sproget på. .
Algoritme af regnemaskine program
Trin 1: Erklære lokale variable n1, n2, res, opt. For eksempel, hvor n1 og n2 tager to numeriske værdier, vil res gemme resultater og opt variabel definere operatørsymbolerne.
Trin 2: Udskriv valget (addition, subtraktion, multiplikation, division osv.
Trin 3: Indtast valget
Trin 4: Tager to tal, n1 og n2
understregning
Trin 5: Skift sagsspring til en operatør valgt af brugeren
Trin 6: Gem resultatet i res variabel.
Trin 7: Vis operationsresultatet
Trin 8: Afslut programmet.
Forskellige måder at oprette et regneprogram i C
Følgende er de forskellige måder at skrive et regneprogram på C-sproget.
java cast streng til int
- Lommeregner Program i C ved hjælp af switch-sætningen
- Lommeregner Program i C ved hjælp af if else if-sætning
- Lommeregner Program i C ved hjælp af do-while loop og switch statement
- Lommeregner Program i C ved hjælp af funktion og switch-sætning
Eksempel 1: Lommeregner Program i C ved hjælp af switch-sætningen
Lad os skrive et program til at oprette et Lommeregner-program ved hjælp af switch-sætning
program.c
#include int main() { // declare local variables char opt; int n1, n2; float res; printf (' Choose an operator(+, -, *, /) to perform the operation in C Calculator
'); scanf ('%c', &opt); // take an operator if (opt == '/' ) { printf (' You have selected: Division'); } else if (opt == '*') { printf (' You have selected: Multiplication'); } else if (opt == '-') { printf (' You have selected: Subtraction'); } else if (opt == '+') { printf (' You have selected: Addition'); } printf ('
Enter the first number: '); scanf(' %d', &n1); // take fist number printf (' Enter the second number: '); scanf (' %d', &n2); // take second number switch(opt) { case '+': res = n1 + n2; // add two numbers printf (' Addition of %d and %d is: %.2f', n1, n2, res); break; case '-': res = n1 - n2; // subtract two numbers printf (' Subtraction of %d and %d is: %.2f', n1, n2, res); break; case '*': res = n1 * n2; // multiply two numbers printf (' Multiplication of %d and %d is: %.2f', n1, n2, res); break; case '/': if (n2 == 0) // if n2 == 0, take another number { printf ('
Divisor cannot be zero. Please enter another value '); scanf ('%d', &n2); } res = n1 / n2; // divide two numbers printf (' Division of %d and %d is: %.2f', n1, n2, res); break; default: /* use default to print default message if any condition is not satisfied */ printf (' Something is wrong!! Please check the options '); } return 0; } Produktion:
Eksempel 2: Lommeregner Program i C ved hjælp af if else if-sætning
Lad os overveje et eksempel for at skrive et simpelt regneprogram i C ved at bruge if else if-sætning.
program2.c
#include int main() { // declare local variables char opt; int n1, n2; float res; printf (' Select an operator (+, -, *, /) to perform an operation in C calculator
'); scanf ('%c', &opt); // take an operator printf (' Enter the first number: '); scanf(' %d', &n1); // take fist number printf (' Enter the second number: '); scanf (' %d', &n2); // take second number if (opt == '+') { res = n1 + n2; // add two numbers printf (' Addition of %d and %d is: %f', n1, n2, res); } else if (opt == '-') { res = n1 - n2; // subtract two numbers printf (' Subtraction of %d and %d is: %f', n1, n2, res); } else if (opt == '*') { res = n1 * n2; // multiply two numbers printf (' Multiplication of %d and %d is: %f', n1, n2, res); } else if (opt == '/') { if (n2 == 0) // if n2 == 0, take another number { printf ('
Divisor cannot be zero. Please enter another value '); scanf ('%d', &n2); } res = n1 / n2; // divide two numbers printf (' Division of %d and %d is: %.2f', n1, n2, res); } else { printf('
You have entered wrong inputs '); } return 0; } Produktion:
Eksempel 3: Lommeregner Program i C ved hjælp af do while loop og switch-sætning
Lad os oprette et regneprogram ved hjælp af do while loop og switch case statement i C
program3.c
forskel mellem $ og $$
#include #include #include int main() { // declaration of local variable op; int op, n1, n2; float res; char ch; do { // displays the multiple operations of the C Calculator printf (' Select an operation to perform the calculation in C Calculator: '); printf ('
1 Addition 2 Subtraction
3 Multiplication 4 Division
5 Square 6 Square Root
7 Exit
Please, Make a choice '); scanf ('%d', &op); // accepts a numeric input to choose the operation // use switch statement to call an operation switch (op) { case 1: // Add two numbers printf (' You chose: Addition'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); res = n1 + n2; // Add two numbers printf (' Addition of two numbers is: %.2f', res); break; // break the function case 2: // Subtract two numbers printf (' You chose: Subtraction'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); res = n1 - n2; // subtract two numbers printf (' Subtraction of two numbers is: %.2f', res); break; // break the function case 3: // Multiplication of the numbers printf (' You chose: Multiplication'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); res = n1 * n2; // multiply two numbers printf (' Multiplication of two numbers is: %.2f', res); break; // break the function case 4: // Division of the numbers printf (' You chose: Division'); printf ('
Enter First Number: '); scanf (' %d', &n1); printf (' Enter Second Number: '); scanf (' %d', &n2); if (n2 == 0) { printf ('
Divisor cannot be zero. Please enter another value '); scanf ('%d', &n2); } res = n1 / n2; // divide two numbers printf (' Division of two numbers is: %.2f', res); break; // break the function case 5: // getting square of a number printf (' You chose: Square'); printf ('
Enter First Number: '); scanf (' %d', &n1); res = n1 * n1; // get square of a number printf (' Square of %d number is: %.2f', n1, res); break; // break the function case 6: // getting the square root of the number printf (' You chose: Square Root'); printf ('
Enter First Number: '); scanf (' %d', &n1); res = sqrt(n1); // use sqrt() function to find the Square Root printf (' Square Root of %d numbers is: %.2f', n1, res); break; // break the function case 7: printf (' You chose: Exit'); exit(0); break; // break the function default: printf(' Something is wrong!! '); break; } printf ('
**********************************************
'); } while (op != 7); return 0; } Produktion:
Eksempel 4: Lommeregner Program i C ved hjælp af funktion og switch-sætning
Lad os oprette et lommeregnerprogram ved hjælp af funktion og switch case statement i C
program4.c
#include #include #include #include // function declarations int addition(); int subtract(); int multiply(); int divide(); int sq(); int sqrt1(); void exit(); int main() { // declaration a local variable op; int op; do { // displays the multiple operations of the C Calculator printf (' Select an operation to perform the calculation in C Calculator: '); printf ('
1 Addition 2 Subtraction
3 Multiplication 4 Division
5 Square 6 Square Root
7 Exit
Please, Make a choice '); scanf ('%d', &op); // accepts a numeric input to choose the operation // use switch statement to call an operation switch (op) { case 1: addition(); /* It call the addition() function to add the given numbers */ break; // break the function case 2: subtract(); /* It call the subtract() function to subtract the given numbers */ break; // break the function case 3: multiply(); /* It call the multiply() function to multiply the given numbers */ break; // break the function case 4: divide(); // It call the divide() function to divide the given numbers break; // break the function case 5: sq(); // It call the sq() function to get the square of given numbers break; // break the function case 6: sqrt1(); /* It call the sqrt1() function to get the square root of given numbers */ break; // break the function case 7: exit(0); // It call the exit() function to exit from the program break; // break the function default: printf(' Something is wrong!! '); break; } printf ('
**********************************************
'); } while (op != 7); return 0; } // function definition int addition() { int i, sum = 0, num, f_num; // declare a local variable printf (' How many numbers you want to add: '); scanf ('%d', &num); printf (' Enter the numbers:
'); for (i = 1; i <= num; i++) { scanf(' %d', &f_num); sum="sum" + f_num; } printf (' total of the numbers="%d'," sum); return 0; use subtract() function to subtract two int n1, n2, res; first number is: '); scanf &n1); second &n2); res="n1" - n2; subtraction %d res); multiply() multiply * divide() divide if (n2="=" 0)
divisor cannot be zero. please enter another value ('%d', division sq() get square given a square: n1; sqrt1() root float root: %f', < pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/c-tutorial/61/calculator-program-c-5.webp" alt="Calculator Program in C"> <hr></=>