Question

Write a C program that

a. Asks for a sentence (max 80 characters) or “quit” to quit.

b. Uses a helper function to print a right triangle of each letter in the sentence with the spaces removed. (It is ok if the last line of the triangle is not a full line.) In other words, first print a line with one character, print the next line with one more character than the previous line, and repeat that pattern until you run out of non-space characters.

c. Goes back to step a. (e.g. starts the program again).

• You will have to look up how to ask for input! Look up fgets() using the man pages with this commands on the student server: man fgets You will want to be sure to include the right libraries at the top of your program to use with fgets. The libraries needed will be shown at the top of the man page. • Quotes matter. Single quotes go around a single character. Double quotes go around a string. Strings are really just character arrays, so don’t be afraid to index into them. • Do not use static or global variables to implement the assignment

Answer 1

#include <stdio.h>

#include <string.h>

void printTriangle(char *str);

int main(){

char sentence[81];

int done = 0;

while(done != 1){

printf("Enter a sentence(type quit to stop)\n");

fgets(sentence, 80, stdin);

if(strcmp(sentence, "quit\n") == 0) //comparing along with \n since fgets() returns string with \n

done = 1;

else

printTriangle(sentence);

}

}

void printTriangle(char *str){

int index = 0;

int line = 1;

int i;

while(str[index] != '\0'){

for(i = 1; i <= line; index++){

if(str[index] == ' ')

continue;

else if(str[index] == '\0')

break;

printf("%c",str[index]);

i++;

}

line++;

printf("\n");

}

printf("\n");

}