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//program to input a sentence (char array) and count number of vowels and consonants in it using for loop #include<conio.h> #include<string.h> #include<stdio.h> void main() { char str[20]; char ch; int i,len; int vowels=0,cons=0; clrscr(); printf("\nenter a string"); gets(str); len=strlen(str); for(i=0;i<len;i++) { ch=str[i]; if((ch=='a') || (ch=='e') || (ch=='i') ||(ch=='o') ||(ch=='u')) { vowels++; } else { cons++; } } printf("\nnumber of vowels are %d",vowels); printf("\nnumber of consonants are %d",cons); getch(); }