warning: return type of �main� is not �int�

When we will compile a c program we may get following error message:



warning: return type of �main� is not �int�



Solution:



Cause of this warning message is return type of main function is not int. It is necessary to return an int value by main function. If main function returns 0 then operating system treat it as success.



For example:



int main(){

//Write your c code.

}

undefined reference to `sqrt' collect2: ld returned 1 exit status

When we will compile a c program in Linux GCC compiler we may get error message:

undefined reference to `sqrt' collect2: ld returned 1 exit status

Cause of this error is by default math.h library has not included.

Solution:

Compile the c code in the following way:

[root@localhost ~]# gcc abc.c -lm

Note: Here abc.c is name of any c code file.

undefined reference to `pow' collect2: ld returned 1 exit status

In Linux GCC compiler when we compile a c program may get error message:

Error message: undefined
reference to `pow' collect2: ld returned 1 exit status

Compiler:
Linux gcc



Solution:



Cause of this error is
by default math.h library has not included. So compile the c code in following
way:



[root@localhost ~]# gcc
abc.c -lm



Note: Here abc.c is name
of any c code file.

Advanced c tutorial

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If an employee spends 30% of his salary on fooding, 10% on clothing and 15% on other work. In this way he saves 10000 per month. Write a c program to find his total salary.

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px

C program to print all odd numbers between 1 and 100

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px 1px;
border: 0px 0px 0px 0px

}
.explanation{
color:#800000;
font-size:25px;
font-weight:900;
letter-spacing:15
}














#include

int main(){

int i;

for(i=1;i<100;i=i+2){

printf("%d\n"

C program for sum of even numbers from 1 to 100

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px

compound interest program in c

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px

c code for division of two complex numbers

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
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c code for multiplication of two complex numbers

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
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margin:1px 1px 1px 1px;
padding:1px 1px 1px

Write a c program to find the sum of first and last digit of any number

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
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.fieldsetIn{
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C program to find average and percentage of marks in five different subjects.

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px 1px;
border: 0px 0px 0px 0px

}
.explanation{
color:#800000;
font-size:25px;
font-weight:900;
letter-spacing:15
}






C program to find average and percentage of marks in five different subjects.


#include

Write a c program to add two very large numbers

Write a c program to add two very large or big numbers


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}
.fieldsetIn{
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margin:1px 1px 1px 1px;
padding:1px 1px 1px 1px;
border: 0px 0px 0px 0px

}
.explanation{
color:#800000;
font-size:25px;
font-weight:900;
letter-spacing:15
}







#include

#include

Write a c program which takes distance between two cities in k.m. a and convert it in meter,c.m.,inch and feet.

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background:#1E90FF;
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.fieldsetIn{
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Write a c program to find volume of a cone

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background:#1E90FF;
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.fieldsetIn{
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Write a c program to find volume and surface area of a cube

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.fieldsetIn{
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C program to find out area of trapezium

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px 1px;
border: 0px 0px 0px 0px

}
.explanation{
color:#800000;
font-size:25px;
font-weight:900;
letter-spacing:15
}








1. C program or source code for find area of
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2. How to calculate area of trapezium

C program to find area of an equilateral triangle

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px 1px;
border: 0px 0px 0px 0px

}
.explanation{
color:#800000;
font-size:25px;
font-weight:900;
letter-spacing:15
}









C
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How
to calculate area of an equilateral

c program to find area of right angled triangle

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
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padding:1px 1px 1px

c program to find area rectangle

.fieldsetOut{
background:#1E90FF;
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font-family: "courier new"
}
.fieldsetIn{
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margin:1px 1px 1px 1px;
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c program to find area of triangle

.fieldsetOut{
background:#1E90FF;
padding:0px 0px 0px 0px;
font-family: "courier new"
}
.fieldsetIn{
background:white;
margin:1px 1px 1px 1px;
padding:1px 1px 1px 1px;
border: 0px 0px 0px 0px

}
.explanation{
color:#800000;
font-size:25px;
font-weight:900;
letter-spacing:15
}








C
program to find area of triangle

C
program to calculate area of triangle




#include<

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