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--- software_carpentary2 [2011/06/20 03:53]
medhamsh
+++ software_carpentary2 [2011/06/20 04:15]
medhamsh
@@ Line 69: / Line 69: @@
 Find the exercises at http://software-carpentry.org/3_0/qa.html
+====== Reading Code ======
+Read the following code and test!
+<code>
+void main()
+{
+char str[40];
+int i,flag=0,len;
+clrscr();
+printf("\n Enter A string : ");
+gets(str);
+len=strlen(str);
+for(i=0;i<(len/2);i++)
+{
+if(str[i]!=str[len-1-i])
+{
+flag=1;
+break;
+}
+}
+if(flag==1)
+{
+printf(" \n The string is not palindrome");
+}
+if(flag==0)
+printf("\n String is palindrome");
+getch();
+}
+</code>
+<code>
+void main()
+{
+char main_str[40],str[40];
+int i,j,len1,len2;
+clrscr();
+printf("\n Enter the main String :");
+gets(main_str);
+printf("\n enter the String you wanna search : ");
+gets(str);
+len1=strlen(main_str);
+len2=strlen(str);
+i=0;
+j=0;
+while(str[i]!='\0')
+{
+while(main_str[j]!='\0')
+{
+if(str[i]==main_str[j])
+{
+i++;
+if(len2==i)
+{
+j=j-len2+2;
+printf("\n found at %d location",j);
+break;
+}
+}//if
+else
+j++;
+}//inner while
+if(j==len1)
+{
+printf("\n not Found");
+break;
+}//if
+}//outer while
+getch();
+}
+</code>
+<code>
+void main()
+{
+int a,b;
+clrscr();
+printf("\n enter First Number :");
+scanf("%d",&a);
+printf("\n enter Second Number :");
+scanf("%d",&b);
+swap(&a,&b);
+printf("\n first Number is : %d",a);
+printf("\n second Number is : %d",b);
+getch();
+}
+swap(int *a,int *b)
+{
+*a=*a-*b;
+*b=*a+*b;
+*a=*b-*a;
+}
+</code>
+<code>
+main()
+{
+int temps[31];
+int index,total;
+float average,celsius;
+total=0.0;
+for(index=0;index<31;index++)
+{
+printf("enter temperature #%d:",index);
+scanf("%d",&temps[index]);
+}
+for(index=0;index<31;index++)
+total+=temps[index];
+average=total/31.0
+printf("average is:%f\n\n", average);
+puts9"fahrenheit\tcelsius\n");
+for(index=0;index<31;index++)
+{
+celsius=(5.0/9.0)*(temps[index]-32);
+printf("%d\t\t%6.2f\n",temps[index],celsius);
+}
+}
+</code>
+<code>
+#include "stdio.h"
+main()
+{
+FILE*fp;
+int letter;
+if((fp=fopen("MYFILE","r"))==NULL)
+{
+puts("Cannot oepn the file");
+exit();
+}
+while((letter=fgetc(fp)) !=eof)
+printf("%c",letter);
+fclose(fp);
+}
+</code>
+====== Make: Automated Builds ======
+The make utility
+If you run
+<code>
+make
+</code>
+this program will look for a file named makefile in your directory, and then execute it.
+If you have several makefiles, then you can execute them with the command:
+<code>
+make -f MyMakefile
+</code>
+There are several other switches to the make utility. For more info, man make.

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