C Articles - Page 131 of 134

The function iswlower() is a built-in function in C/C++. It checks whether the wide character is in lower case or not. It is declared in “cwctype” header file in C++ language while “ctype.h” in C language. It takes a single character which is known as wide character. It will return zero(0), if the character is not a lower case character. It will return non-zero value, if character is lower case.Here is the syntax of iswlower() in C/C++ language, int iswlower(ch);Here is an example of iswlower() in C++ language, Example Live Demo#include #include using namespace std; int main() {   ... Read More

Enumeration is a user defined datatype in C language. It is used to assign names to the integral constants, which makes a program easy to read and maintain. The keyword “enum” is used to declare an enumeration.Here is the syntax of enum in C language, enum enum_name{const1, const2, ....... };The enum keyword is also used to define the variables of enum type. There are two ways to define the variables of enum type as follows.enum week{sunday, monday, tuesday, wednesday, thursday, friday, saturday}; enum week day;Here is an example of enum in C language, Example#include enum week{Mon=10, Tue, Wed, Thur, Fri=10, ... Read More

Here is the program to convert a string to uppercase in C language,Example#include #include int main() {    char s[100];    int i;    printf("Enter a string : ");    gets(s);    for (i = 0; s[i]!='\0'; i++) {       if(s[i] >= 'a' && s[i] = 'a' && s[i]

For LoopThe for loop is a repetition control structure. It executes the statements a specific number of times. First, it takes the initial value from where it starts the iterations. Second, it takes the condition, which is checked for true, or false. At the end, it increment/ decrement and update the loop variables.Here is the syntax of for loop in C language,for ( init; condition; increment ) {    statement(s); }Here is an example of for loop in C language,Example Live Demo#include int main () {    int a = 5;    for(int i=0;i

FloatFloat is a datatype which is used to represent the floating point numbers. It is a 32-bit IEEE 754 single precision floating point number (1-bit for the sign, 8-bit for exponent, 23*-bit for the value. It has 6 decimal digits of precision.Here is the syntax of float in C language, float variable_name;Here is an example of float in C language, Example Live Demo#include #include int main() {    float x = 10.327;    int y = 28;    printf("The float value : %f", x);    printf("The sum of float and int variable : %f", (x+y));    return 0; }OutputThe float value ... Read More

The function strcmp() is a built-in library function and it is declared in “string.h” header file. This function is used to compare the string arguments. It compares strings lexicographically which means it compares both the strings character by character. It starts comparing the very first character of strings until the characters of both strings are equal or NULL character is found.If the first character of both strings are equal, it checks second character and so on. This process will be continued until NULL character is found or both characters are unequal.Here is the syntax of strcmp() in C language, int ... Read More

All these functions read the character from input and return an integer. The value of EOF is used for this purpose.getc()It reads a single character from the input and return an integer value. If it fails, it returns EOF.Here is the syntax of getc() in C language, int getc(FILE *stream);Here is an example of getc() in C language, Example Live Demo#include int main () {    char val;    printf("Enter the character: ");    val = getc(stdin);    printf("Character entered: ");    putc(val, stdout);    return(0); }OutputEnter the character: a Character entered: agetchar()The function getchar() reads the character from the standard ... Read More

printf()The function printf() is used to print the message along with the values of variables.Here is the syntax of printf() in C language, printf(const char *str, ...);Here is an example of printf() in C language, Example Live Demo#include int main() {    int a = 24;    printf("Welcome! ");    printf("The value of a : %d", a);    getchar();    return 0; }OutputWelcome! The value of a : 24sprintf()The function sprintf() is also known as string print function. It do not print the string. It stores the character stream on char buffer. It formats and stores the series of characters and ... Read More

Generally, printf() function is used to print the text along with the values. If you want to print % as a string or text, you will have to use ‘%%’. Neither single % will print anything nor it will show any error or warning.Here is an example to print % in printf() in C language, Example Live Demo#include int main() {    printf("%");    printf("%%");    getchar();    return 0; }Output%There are some other ways to print % in the text message as in the following example, Example Live Demo#include #include int main() {    printf("welcome%");    printf("%%");    printf("%c", '%');   ... Read More

In C language, %n is a special format specifier. It cause printf() to load the variable pointed by corresponding argument. The loading is done with a value which is equal to the number of characters printed by printf() before the occurrence of %n.Note − It does not print anything. Another printf() function is used to print the statement.Here is an example of %n in C language, Example Live Demo#include int main() {    int s;    printf("The value of %ns : ", &s);    printf("%d", s);    getchar();    return 0; }OutputThe value of s : 13Even if we give the ... Read More