8escs01 problem solving through programming unit-2: c programming basics

MANAGING INPUT & OUTPUT OPERATIONS

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UNFORMATTED OUTPUT FUNCTIONS
(c) puts( ) function:

• puts displays a single / paragraph of text to the standard output device.
• Syntax: puts(variable_name);

• Example: #include #include

Output:

void main( ) { char a[20];	Abcd Abcd	efgh efgh
gets(a);
puts(a);
getch( );
}

Example Program

/*A program to read a character from keyboard and then prints it in reverse case*/
/*This program uses three new functions: islower,toupper,and tolower.
#include
#include main()
{
char alphabet; printf(“Enter an alphabet”); putchar(‘\n’);
alphabet = ghetchar(); if(islower(alphabet)) putchar(toupper(alphabet)); else putchar(tolower(alphabet));
}
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Output:
Enter An alphabet a
A
Enter An alphabet Q
q
Enter An alphabet z
Z

DECISION MAKING & BRANCHING

CONTROL STATEMENTS

• Control Statement are program statements that are cause a jump of control from one part of program to another part of program
• These statements are classified into two types:
• Branching Statements
• Looping Statements

CONTROL STATEMENTS

BRANCHING STATEMENTS

• In decision making statements, group of statements are executed when condition is true. If condition is false, then else part statements are executed.
• There are 3 types of decision making control statements in C language. They are:
• if statements
• ifelse statements
• nested if statements
• elseif statements
• Switch statements