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								a1/program.c
									
									
									
									
									
								
							@ -3,17 +3,19 @@
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int main() {
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    int ch;
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    int line_count = 0; // 
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    int line_count = 0;
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    while ((ch = getchar()) != EOF) {
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    while ((ch = getchar()) != EOF) { 
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        if (islower(ch)) {  
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            putchar(toupper(ch));  
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            putchar(toupper(ch)); 
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        } else if (isupper(ch)) {
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            putchar(tolower(ch));  
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        } else if (ch == '\n') {
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            putchar(ch); 
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            line_count++; 
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        } else if (ch == '\t') {
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            putchar(ch);  
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            line_count++;
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        } else if (ch >= 32 && ch <= 126) {
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        } else if (ch >= 32 && ch <= 126) { 
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            putchar(ch);
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        }
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    }
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