Fundamentals of C | C Programs

Prog. 1 : Displays the value of an int variable on the screen using printf() function

#include <stdio.h>

main()

{

int myNumber;

myNumber = 786;

printf("Value of myNumber is : %d\n", myNumber); return(0) ;

}

Output :

Value of myNumber is : 786

Prog. 2: displays the values of three int variables on the screen using printf() function.

#include <stdio.h>

main()

{

int n1, n2, n3;

n1 = 10;

n2 = 50;

n3 = n1 * n2;

printf("%d multiplied by %d is : %d\n", n1, n2, n3); return(0) ;

}

Output :

10 multiplied by 50is : 500

Prog. 3: Displays the values of char variable on the screen using the conversion specifications %c and %d.

#include <stdio.h>

main()

{

char letter;

letter = '#';

printf("Character stored in letter is : %c\n", letter);

printf("Integer value stored in letter is : %d\n", letter); return(0);

}

Output :

Character stored in letter is : #

Integer value stored in letter is : 35

Prog. 4: Displays the extreme values of integral types on the screen.

#include <stdio.h>

main()

{

int n1 = -32768, n2 = 32767;

short int n3 = -128, n4 = 127;

long int n5 = -2147483648L, n6 = 2147483647L; signed int n7 = -32768, n8 = 32767; unsigned int n9 = 0, n10 = 65535U; signed short int n11 = -128, n12 = 127;

unsigned short int n13 = 0, n14 = 255;

signed long int n15 = -2147483648L, n16 = 2147483647L; unsigned long int n17 = 0, n18 = 4294967295UL; printf("int: n1 = %d, n2 = %d\n", n1, n2); printf("short int: n3 = %d, n4 = %d\n", n3, n4);

printf("long int: n5 = %ld, n6 = %ld\n", n5, n6);

printf("signed int: n7 = %d, n8 = %d\n", n7, n8);

printf("unsigned int: n9 = %u, n10 = %u\n", n9, n10);

printf("signed short int: n11 = %d, n12 = %d\n", n11, n12);

printf("unsigned short int: n13 = %d, n14 = %d\n", n13, n14);

printf("signed long int: n15 = %ld, n16 = %ld\n", n15, n16);

printf("unsigned long int: n17 = %lu, n18 = %lu\n", n17, n18);

return(0);

}

Output:

int: n1 = -32768, n2 = 32767

short int: n3 = -128, n4 = 127

long int: n5 = -2147483648, n6 = 2147483647

signed int: n7 = -32768, n8 = 32767

unsigned int: n9 = 0, n10 = 65535

signed short int: n11 = -128, n12 = 127

unsigned short int: n13 = 0, n14 = 255

signed long int: n15 = -2147483648, n16 = 2147483647

unsigned long int: n17 = 0, n18 = 4294967295

  

Prog. 5: Displays the extreme values of float types on the screen.

/* This program displays the extreme values of float type on the */

/* screen by passing the variables to printf() function. */

#include <stdio.h>

main()

{

float f1 = -3.4e-38F, f2 = -3.4e+38F;

float f3 = 3.4e-38F, f4 = 3.4e+38F;

float f5 = -10.34F, f6 = 25.83F;

printf("f1 = %e, f2 = %e\n", f1, f2);

printf("f3 = %e, f4 = %e\n", f3, f4);

printf("f1 = %g, f2 = %g\n", f1, f2);

printf("f3 = %g, f4 = %g\n", f3, f4);

printf("f5 = %f, f6 = %f\n", f5, f6);

return(0);

}

Output :

f1 = -3.400000e-38, f2 = -3.400000e+38

f3 = 3.400000e-38, f4 = 3.400000e+38

f1 = -3.4e-38, f2 = -3.4e+38

f3 = 3.4e-38, f4 = 3.4e+38

f5 = -10.340000, f6 = 25.830000

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