Main.cc: In function ‘int main()’: Main.cc:5:12: error: expected ‘)’ before numeric constant if(a=10 1); ~ ^~ ) Main.cc:5:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(a=10 1); ~^~~ Main.cc:5:5: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation] if(a=10 1); ^~ Main.cc:6:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’ { ^