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== == What is printf in c or prototype of printf with example
(q) What is prototype of printf function ? Explain each term.
Ans: Prototype of printf function is :
int printf( const char *format ,…)
Explanation of each term :
Parameter of printf function is :
(three continuous dots) : It is called ellipsis. It indicates the variable number of
arguments.
Example of ellipsis:
#include
void ellipsis(int a,...);
void main()
{
int a=5,b=10;
clrscr();
ellipsis(a,b);
getch();
}
void ellipsis(int a,...)
{
printf("%d ",a);
}
Output:5
So printf function can have any number of variables as an argument.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoWe use the printf function to display the output on the screen....
and if u have writtten a program and executed it with no errors then how u'll see the output ?but just coz of the printf statement
Wiki User
∙ 12y agoprintf is used to display the output of a program
Wiki User
∙ 13y agofunction, just like scanf, system, read, malloc etc.
Wiki User
∙ 12y agoNo it is a pre-defined function from the library.
That is why it includes a pair of paranthesis.
Eg: printf("This is the answer");
Wiki User
∙ 12y agoIt's a function that print (something) on the terminal
it's like (cout) function.
Wiki User
∙ 9y agoScanf and printf both functions are inbuilt in C language. Scanf is used to read a string. Printf is used to print something.
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Why isn't main a keyword in c?
Neither is printf, stderr or NULL. Certainly, they are important words, but not keywords.
What is a token in c?
Anything that you can't put whitespace between. The indivisible elements of a program. Example: printf("Sup world %d",variable); Tokens: (7 total) printf ( "Sup World %d" , variable ) ;
How do you write c program to identify keywords using transition table?
#include#include#includevoid keyw(char str[10]){if(strcmp("for",str)==0)printf("%s is a keyword",str);else if(strcmp("while",str)==0)printf("%s is a keyword",str);else if(strcmp("char",str)==0)printf("%s is a keyword",str);else if(strcmp("int",str)==0)printf("%s is a keyword",str);else if(strcmp("if",str)==0)printf("%s is a keyword",str);else if(strcmp("else",str)==0)printf("%s is a keyword",str);elseprintf("%s is an identifier",str);printf("\n");}main(){FILE *f1,*f2,*f3;char c,str[10];int num[100],ln=0,tvalue=0,i=0,j=0,k=0;printf("Enter a C program expression");f1=fopen("input.c","w");while((c=getchar())!=EOF)fputc(c,f1);f1=fopen("input.c","r");f2=fopen("identifier.txt","w");f3=fopen("specialchars.txt","w");while((c=fgetc(f1))!=EOF){if(isdigit(c)){tvalue=c-'0';c=fgetc(f1);while(isdigit(c)){tvalue=tvalue*10+c-'0';c=fgetc(f1);}num[i++]=tvalue;ungetc(c,f1);}else if(isalpha(c)){fputc(c,f2);c=fgetc(f1);while((isdigit(c))isalpha(c)c==' 'c=='$'){fputc(c,f2);c=fgetc(f1);}fputc(' ',f2);ungetc(c,f1);}else if(c==' 'c=='\t');else if(c=='\n')ln++;elsefputc(c,f3);}fclose(f1);fclose(f2);fclose(f3);printf("Numbers in the program are \n");for(j=0;j
C programming diamond shape for loops Problem and output sample is in the picture?
#include<stdio.h> main() { int i; for(i=1;i<=1;i++) { printf("*",i); } printf("\n"); for(i=1;i<=3;i++) { printf("*",i); } printf("\n"); for(i=1;i<=5;i++) { printf("*",i); } printf("\n"); for(i=1;i<=3;i++) { printf("*",i); } printf("\n"); for(i=1;i<=1;i++) { printf("*",i); } }
Simulation of finite state automata to recognize the tokens of control statement?
#include<stdio.h> #include<conio.h> #include<string.h> void main() { char a[8];int s,i,flag=0,loc1=0,loc2=0,j; clrscr(); printf("Enter any string\n"); gets(a); for(i=0;i<8;i++) { int ch=a[i]; if(ch!=32) { loc2=i; flag++; } if(ch==32) { s=flag; flag=0; switch(s) { case 2: if(a[loc1]=='i' && a[loc2]=='f') printf("STRING HAS if AS A KEYWORD"); break; case 3: if(a[loc1]=='f' && a[loc1+1]=='o' && a[loc2]=='r') printf("STRING HAS for AS A KEYWORD"); break; default: printf("not our case"); } } } getch(); }
Why isn't main a keyword in c?
Neither is printf, stderr or NULL. Certainly, they are important words, but not keywords.
How is the 'sizeof' keyword in a c program used to determine the amount of space of a variable?
It is 'sizeof'. Example: printf ("sizeof(int)=%d\n", sizeof (int));
What is a token in c?
Anything that you can't put whitespace between. The indivisible elements of a program. Example: printf("Sup world %d",variable); Tokens: (7 total) printf ( "Sup World %d" , variable ) ;
How do you write c program to identify keywords using transition table?
#include#include#includevoid keyw(char str[10]){if(strcmp("for",str)==0)printf("%s is a keyword",str);else if(strcmp("while",str)==0)printf("%s is a keyword",str);else if(strcmp("char",str)==0)printf("%s is a keyword",str);else if(strcmp("int",str)==0)printf("%s is a keyword",str);else if(strcmp("if",str)==0)printf("%s is a keyword",str);else if(strcmp("else",str)==0)printf("%s is a keyword",str);elseprintf("%s is an identifier",str);printf("\n");}main(){FILE *f1,*f2,*f3;char c,str[10];int num[100],ln=0,tvalue=0,i=0,j=0,k=0;printf("Enter a C program expression");f1=fopen("input.c","w");while((c=getchar())!=EOF)fputc(c,f1);f1=fopen("input.c","r");f2=fopen("identifier.txt","w");f3=fopen("specialchars.txt","w");while((c=fgetc(f1))!=EOF){if(isdigit(c)){tvalue=c-'0';c=fgetc(f1);while(isdigit(c)){tvalue=tvalue*10+c-'0';c=fgetc(f1);}num[i++]=tvalue;ungetc(c,f1);}else if(isalpha(c)){fputc(c,f2);c=fgetc(f1);while((isdigit(c))isalpha(c)c==' 'c=='$'){fputc(c,f2);c=fgetc(f1);}fputc(' ',f2);ungetc(c,f1);}else if(c==' 'c=='\t');else if(c=='\n')ln++;elsefputc(c,f3);}fclose(f1);fclose(f2);fclose(f3);printf("Numbers in the program are \n");for(j=0;j
Can you use nested printf?
printf ("nested printf returned %d\n", printf ("inner printf\n"));
C programming diamond shape for loops Problem and output sample is in the picture?
#include<stdio.h> main() { int i; for(i=1;i<=1;i++) { printf("*",i); } printf("\n"); for(i=1;i<=3;i++) { printf("*",i); } printf("\n"); for(i=1;i<=5;i++) { printf("*",i); } printf("\n"); for(i=1;i<=3;i++) { printf("*",i); } printf("\n"); for(i=1;i<=1;i++) { printf("*",i); } }
Simulation of finite state automata to recognize the tokens of control statement?
#include<stdio.h> #include<conio.h> #include<string.h> void main() { char a[8];int s,i,flag=0,loc1=0,loc2=0,j; clrscr(); printf("Enter any string\n"); gets(a); for(i=0;i<8;i++) { int ch=a[i]; if(ch!=32) { loc2=i; flag++; } if(ch==32) { s=flag; flag=0; switch(s) { case 2: if(a[loc1]=='i' && a[loc2]=='f') printf("STRING HAS if AS A KEYWORD"); break; case 3: if(a[loc1]=='f' && a[loc1+1]=='o' && a[loc2]=='r') printf("STRING HAS for AS A KEYWORD"); break; default: printf("not our case"); } } } getch(); }
Write a program to find the largest of three numbers and print the output in ascending order?
void main() { int a,b,c; clrscr(); printf("Enter the value of a:"); scanf("%d",&a); printf("\nEnter the value of b:"); scanf("%d",&b); printf("\nEnter the value of c:"); scanf("%d",&c); if(a>b) { if(a>c) { if(b>c) { printf("c is smallest\n"); printf("b is middle\n"); printf("a is largest\n"); } else { printf("b is smallest\n"); printf("c is middle\n"); printf("a is largest\n"); } } else { printf("b is smallest\n"); printf("a is middle\n"); printf("c is largest\n"); } } else if(b>c) { if(a>c) { printf("c is smallest\n"); printf("a is middle\n"); printf("b is largest\n"); } else { printf("a is smallest\n"); printf("c is middle\n"); printf("b is largest\n"); } } else { printf("a is smallest\n"); printf("b is middle\n"); printf("c is largest\n"); } getch(); }
What is printf function?
Printf function is used in c language. Printf is used to print something to the standard output. ex: printf ('welcome');
Where the printf statements are stored in memory?
Try this: #include <stdio.h> int main (void) { printf ("printf is at location %p\n", (void *)printf); printf ("main is at location %p\n", (void *)main); return 0; }
How do you write a c program to print words when numbers are given?
void print_num_as_word (unsigned num) { switch (num) { case 0: printf ("zero"); break; case 1: printf ("one"); break; case 2: printf ("two"); break; case 3: printf ("three"); break; case 4: printf ("four"); break; case 5: printf ("five"); break; case 6: printf ("six"); break; case 7: printf ("seven"); break; case 8: printf ("eight"); break; case 9: printf ("nine"); break; } }
What should be given at in if printf hello else world to get the output helloworld that is to make both the statements in ifelse clause to execute what should be given in if clause?
main() { if( !fork() ) printf("Hello"); else printf("World"); } This works fine. if (!printf("hello")) printf("Hello"); else printf(" World\n");
