Write a program that reads from the external file input. txt, capitalizes all words that begin with the letter "a," and then writes them to an external file output. txt (note: do not forget to copy the blanks. you may wish to use infile. get and outfile. put in your program.)

void capitalize(){

int size_buffer = 100;

int i;

FILE * input;

FILE *output;

input = fopen("input.txt", "r");

output = fopen("output.txt", "w");

char * buffer;

buffer = (char*)calloc(size_buffer, sizeof(char))

while(fgets(buffer, size_buffer*sizeof(char), input) != NULL){

if(buffer[0] == 'a'){

for(i = 0; i < strlen(buffer); i++){

buffer[i] -= 32;

}

fprintf(output, "%s\n", buffer)

}

}

fclose(input);

fclose(output);

}

Explanation:

I am going to write a c code.

You can use the fgets command to read a line from the txt. I am supposing each line only has a word.

To capitalize a letter, we always subtract the char code by 32. For example 'a' is 97, while 'A' is 65, 'b' is 98 while 'B' is 66... I got these informations from the ascii table.

So

void capitalize(){

int size_buffer = 100;

int i;

FILE * input;

FILE *output;

input = fopen("input.txt", "r");

output = fopen("output.txt", "w");

char * buffer;

buffer = (char*)calloc(size_buffer, sizeof(char))

while(fgets(buffer, size_buffer*sizeof(char), input) != NULL){

if(buffer[0] == 'a'){

for(i = 0; i < strlen(buffer); i++){

buffer[i] -= 32;

}

fprintf(output, "%s\n", buffer)

}

}

fclose(input);

fclose(output);

}